We all want Mac laptops that can run for days on a single charge and never need their batteries serviced. Sadly, we’re always going to be disappointed. Battery and power management technologies continually improve, but those improvements are matched by more powerful processors and smaller designs with less room for battery cells. And, because physics is a harsh mistress, current lithium-ion batteries are always going to age chemically, so they hold less of a charge over time.
In the just-released macOS 10.15.5 Catalina, Apple has introduced a new battery health management feature that promises to increase the effective lifespan of the batteries in recent Mac laptops. It does this by monitoring the battery’s temperature and charging patterns and, in all likelihood, reducing the maximum level to which it will charge the battery.
You see the problem. While battery health management can extend your battery’s overall lifespan, it will likely also reduce your everyday runtime before you need to charge. It’s too soon to know the full extent of this tradeoff, and we suspect that it may be impossible to determine, given that everyone uses their Macs differently.
It’s worth noting that this battery health management feature appears only for those running macOS 10.15.5 or later, and only then if the Mac in question is a laptop with Thunderbolt 3 ports. In essence, then, it’s available only on MacBook Pro models introduced in 2016 or later, and MacBook Air models introduced in 2018 and later. (The Thunderbolt 3 port requirement is merely a shorthand way for Apple to indicate “recent Mac laptops.”)
So, if you have a supported laptop and you’re running macOS 10.15.5, what should you do? We see three scenarios:
Favor lifespan: If you seldom run your laptop’s battery down to the electronic fumes because it’s easy for you to plug in whenever you need to charge, leave battery health management enabled. That will preserve the battery’s overall lifespan to the extent possible.
Favor runtime: For those who need to eke every last bit of power from their batteries, disable battery health management. You might have to replace the battery sooner, but you’ll get more runtime in everyday usage.
Switch as needed: Many people need the longest possible runtime only occasionally, such as on long flights with no under-seat power. In such situations, switch battery health management off for the flight and back on when you return to normal usage patterns.
Switching is easy, but Apple buries it deeply enough that it’s clear that the company doesn’t think most users should be disabling it regularly. Open System Preferences > Energy Saver, click the Battery Health button at the bottom, and in the dialog that appears, uncheck Battery Health Management and click OK. You’ll be prompted to make sure you know what you’re doing; click Turn Off to finish the job.
One final note. The reduced maximum capacity with battery health management enabled may have an undesirable side effect—a recommendation from the Battery Status menu’s health indicator that you need to replace your battery. To check your battery’s health, hold the Option key down and click the Battery Status icon on the menu bar. At the top of the menu, next to Condition, you’ll see either Normal or Service Recommended. (In previous versions of macOS, it could have said Replace Soon, Replace Now, or Service Battery.)
Regardless of the term, anything but Normal indicates that your battery is holding less of a charge than when it was new. If you see that message and you aren’t getting enough runtime for your needs, get the battery evaluated at an Apple-authorized service provider or Apple Store.
If you’re plugging your iPhone in regularly but getting low-battery warnings when you shouldn’t, consider the possibility that something is preventing your iPhone from charging successfully while plugged in. If there’s no lightning bolt badge on the battery icon when the iPhone is plugged in, that’s a sure sign that no power is reaching the device. Another hint that failures could be happening intermittently would be a lack of charging in the Last Charge Level graph in Settings > Battery when you know the iPhone was plugged in. Luckily, the solution is often easy. Take a wooden (not metal) toothpick and gently poke around inside the iPhone’s Lightning port for pocket fuzz. You’d be amazed how much crud can end up in there. If cleaning doesn’t solve the problem and you use only a single Lightning cable to charge, try another one.
Are you the person your friends and family members turn to for questions about the Mac? In normal times, those questions might come over dinner or at another in-person gathering, such that you could look directly at their Mac to see what was going on. Now, however, with everyone staying at home due to the coronavirus pandemic, answering those questions has seemingly gotten harder. But it doesn’t have to be that way, thanks to a built-in feature of macOS that you may not have known about: screen sharing.
With the Mac’s built-in Screen Sharing app, you can either observe or control another person’s Mac, anywhere on the Internet. They don’t even need to enable Screen Sharing in System Preferences > Sharing. (Don’t worry—there are multiple ways that Apple ensures that this feature can’t be used surreptitiously.)
Initiate the Connection
There are multiple ways to connect to a remote Mac for screen sharing, but two stand out as being particularly easy.
First, if you communicate in Messages with the person whose Mac you’re trying to control, make sure your conversation with them is selected, and then choose Buddies > Ask to Share Screen. The other person can also initiate the connection with you by choosing Buddies > Invite to Share My Screen.
Second, if Messages doesn’t work for you (those commands are often dimmed), or the other person doesn’t use Messages, there’s another option. Press Command-Space to open Spotlight and type “Screen Sharing”. The Screen Sharing app should be the top hit—press Return to launch it. (For future reference, it’s stored in /System/Library/CoreServices/Applications/Screen Sharing.)
Then, in the dialog that appears, enter the person’s Apple ID, which is likely their email address, and click Connect.
Accept the Connection
Needless to say, macOS doesn’t allow anyone to connect to a Mac like this without permission. The other person needs to accept the connection request, which they do by clicking Accept in the notification that appears, likely in the upper-right corner of the screen. Obviously, clicking Decline immediately terminates the connection.
After clicking Accept, the other person gets yet another permission request, this time with additional options. They can once again choose to Accept or Decline, and choose between allowing you to control the screen or just observe them using it. And, of course, if you ever get a screen sharing request from someone you don’t know, you can always click Block This User to ensure it doesn’t happen again.
Next, a little popover appears to alert the other person to the new icon on the menu bar. The blue menu bar icon constantly flashes while the connection is active so there’s no question that screen sharing is taking place.
So what’s in that menu? Commands for switching between controlling and observing (choose “Allow Name to control my screen” to toggle), mute the microphone (more on that shortly), pause screen sharing, and end the session.
Use the Connection
The Mute Microphone command in the remote Mac’s Screen Sharing menu is a hint—when you’re sharing the screen, the connection also provides full audio communication. This seems helpful, but in many cases, you’re already talking on the phone, at which point it’s helpful to mute the microphone on both sides. Or hang up the phone and stick with Screen Sharing’s audio.
For the most part, once you’re controlling someone’s Mac remotely, it’s just like using the Mac while sitting in front of it. You can move the pointer around, select icons and menus, open apps and documents, and so on. You may notice a slight lag or jitter as the screen draws, since updating it over an Internet connection is much, much slower than in person.
You do have a few special capabilities based largely on the buttons in the toolbar, however:
Toggle Control/Observe: When you’re controlling the remote Mac, you may find yourself competing for the pointer and keyboard with the other person. To let them “drive,” click the binoculars icon in the toolbar to switch to Observe mode. Click the arrow pointer to return to Control mode.
Resize the window: If you’re on a 13-inch MacBook Pro and trying to control a 27-inch iMac screen, it simply won’t fit. Luckily, Screen Sharing lets you resize the window so it does, although some interface elements may become too small to use easily. If that’s a problem, you can disable scaling by clicking the left-most Scaling button, after which everything on the remote screen will appear at normal size. You’ll have to scroll the window to see parts of the screen that are out of view.
Share Clipboard: By default, you’re sharing the Clipboard, so anything you cut or copy on your Mac will be transferred to the other Mac’s Clipboard, and vice versa. If that’s awkward, you can disable it and then use the commands in the Clipboard menu to get or send the Clipboard contents manually.
Take a screenshot: Normal screenshot controls don’t work for taking a screenshot of the remote screen, or rather, they’ll work on the remote Mac. To take a screenshot of what you see and keep it on your Mac, click the Screenshot button.
Transfer files: It’s not obvious, but you can move files back and forth between the two Macs merely by dragging them to and from the remote Mac’s window. You sometimes have to pause slightly for Screen Sharing to realize your pointer has left the remote Mac and is on your Mac, but as soon as you let up on the mouse button, the file copies. A File Transfers window shows progress and history.
When you’re done with your screen sharing session, you can shut it down by choosing End Screen Sharing from the remote Mac’s Screen Sharing menu or just close the window or quit the Screen Sharing app on your Mac. Remember that as soon as you do that, the audio connection will drop as well, so make sure you’ve said goodbye first!
By default, Apple gives every iCloud user 5 GB of storage space. That disappears quickly, given how it’s shared between iCloud Mail, iCloud Drive, iCloud Photos, Messages, and iCloud-enabled apps.
Apple will, of course, sell you more iCloud space. $0.99 per month gets you 50 GB, $2.99 per month provides 200 GB, and for $9.99 per month, you can use a whopping 2 TB. The latter two plans can even be shared with others in your Family Sharing group.
As we’ve noted elsewhere, using iCloud Photos almost certainly requires you to pay for extra storage. But if you’re paying $2.99 per month and nudge up against the 200 GB limit, you may not be enthused about increasing your payment to $9.99 per month when you’re unlikely to need anywhere near 2 TB.
That said, you don’t want to run out of storage space. Email to your iCloud email address will be rejected, photos won’t upload from your iPhone, and app data will fail to sync. Happily, Apple alerts you when you’re running low on space, before things get bad.
It’s often easy to recover space that’s not being used in a helpful way. First, check how much space you have and how much you’re using. In macOS 10.14 Mojave, look at the graph at the bottom of System Preferences > iCloud. In 10.15 Catalina, the graph is in System Preferences > Apple ID > iCloud. In iOS, you’ll find a similar graph at Settings > Your Name > iCloud.
Then, to clear space, work through these five approaches.
1. Remove Unnecessary iCloud Device Backups
The biggest win comes from deleting iCloud device backups for devices you no longer use. It’s common for these to stick around, so if you recently upgraded from an iPhone X to an iPhone 11 Pro, the iPhone X backup is probably still consuming gigabytes.
Navigate to Settings > Your Name > iCloud > Manage Storage > Backups to see what you have. If you find backups for a previous iPhone or iPad, tap it and then tap Delete Backup.
2. Delete Unnecessary Data from iOS Apps
While you’re in the iCloud Storage screen (the leftmost screenshot above), look through the other apps at the top of the list. The Photos app will likely be using the most storage, but all you can do to minimize its space usage is delete unnecessary screenshots, duplicate photos, and accidental videos from Photos. That will likely require lots of manual effort.
However, some other apps—think about third-party camera or video apps—may be using space unnecessarily. Investigate any apps reporting a lot of usage in the iCloud Storage screen, and if possible, clear out the unnecessary data.
Finally, consider Messages. If you regularly trade photos and videos in chats, it could be another place you can save significant space. In the iCloud Storage screen, tap Messages > Top Conversations to see which conversations are the largest. Tap one to switch to Messages, tap the person’s avatar at the top of the conversation, tap the Info button, scroll down to see the photos, and tap See All Photos. Tap Select, tap photos you have no desire to keep within that Messages conversation, and then tap Delete at the bottom-right of the screen.
3. Avoid Backing Up Apps with Massive iCloud Data Stores
If one of your apps is storing a lot of data that you don’t want to delete, but that you don’t care if it were to be lost, you can prevent it from being backed up by iCloud Backup and reduce the size of your backups.
To find such apps, navigate to Settings > Your Name > iCloud > Manage Storage > Backups and tap the name of the device you’re on. That screen shows which apps consume the most space in your backup. Tap the toggle switch next to an app to stop backing it up and delete its data from your backup.
4. Scan for and Delete Large Files in iCloud Drive
It’s hard to know if you’re likely to be using lots of space in iCloud Drive—it all depends on what iCloud-savvy apps you use and if you store other files in iCloud Drive via the Mac’s Finder or the Files app in iOS.
There’s no need to guess, however, thanks to free Mac apps that help you identify especially large files and folders. Our favorites are GrandPerspective and OmniDiskSweeper. GrandPerspective uses a graphical view so you can see at a glance where your space is going, whereas OmniDiskSweeper opts for a classic text-based approach that gives you hard numbers. In GrandPerspective, choose File > Scan Folder and select iCloud Drive in the sidebar of the Open dialog. For OmniDiskSweeper, choose File > Size Folder.
Whichever app you use, it’s easy to select large files or folders and click Delete (GrandPerspective) or Trash (OmniDiskSweeper). You may have to set an option in GrandPerspective > Preferences to enable deletions if its Delete button is disabled.
5. Delete Old Email from iCloud Mail
All the email you store at iCloud counts against your free space, so it can be worth clearing out unwanted old messages (and their large attachments). To delete individual messages using Apple’s Mail, just select them and click the Trash button in the toolbar. Some messages are much bigger than others, however, and to find them, choose View > Sort By > Size. That puts the largest messages at the top.
Of course, deleting messages normally just moves them to the Trash mailbox; to reclaim the space they occupy on iCloud, choose Mailbox > Erase Deleted Items > AccountName. Once you do that, the messages are gone for good.
If you want to remove an entire mailbox and its contents, select it in the sidebar and choose Mailbox > Delete Mailbox. That deletes all of its messages immediately and can’t be undone.
When you put all these space-clearing techniques together, you’ll likely be able to clear enough cruft that you won’t have to pay Apple for more iCloud storage space. But if you’re uncomfortable deleting such data, there’s no shame in upgrading to a larger iCloud storage plan.
Have you ever seen the dreaded “No Service” label at the top of your iPhone’s screen, even when you’re pretty sure there should be cellular reception? It’s not common, but the iPhone’s cellular radio can occasionally get confused. Luckily, you can easily fix the problem. Open Control Center (swipe down from the upper-right corner on an iPhone X or later or an iPad; or up from the bottom on an earlier iPhone) and tap the airplane icon to put the iPhone in airplane mode. That turns off the cellular radio. Wait a few seconds and tap the airplane icon again to re-enable the cellular radio. If that doesn’t work, power-cycle your iPhone by holding the side or Sleep/Wake button until you see the Power Off slider. Slide it to turn the iPhone off, then press and hold the side or Sleep/Wake button again until the iPhone restarts.
For some Mac users, macOS 10.15 Catalina is no longer a choice. That’s because the new 16-inch MacBook Pro and the 2019 Mac Pro that Apple released late last year ship with Catalina installed and can’t run any previous version of macOS.
But for most people, it’s time to consider an upgrade to Catalina. Most backup software now works with Catalina’s bifurcated drive approach that puts the system on a separate, read-only volume from your data and apps. We’ve all had several months to come to terms with the fact that old 32-bit apps won’t even launch in Catalina. And Apple has shipped several updates that bring Catalina to version 10.15.3, addressing most of the complaints users had with the initial release.
If you are ready to try Catalina but still want to use 10.14 Mojave, we have some advice for how to make that happen. This could be the case for someone who has purchased a new Mac that does support Mojave but came with Catalina installed, for someone who wants to test Catalina while still using Mojave, or for someone who wants to move on to Catalina but has a 32-bit app that they aren’t ready to say good-bye to.
Downgrade from Catalina to Mojave on Some New Macs
Apple has started installing Catalina on new Macs other than the 16-inch MacBook Pro and 2019 Mac Pro, but since these older Macs can still run Mojave, it’s possible—if a bit tricky—to downgrade them to Mojave.
System engineer Armin Briegel has worked out a way of downgrading new Macs to Mojave. First, you create a Mojave Installer USB drive. To use that drive to boot a Mac with a T2 security chip, you must allow external booting from the Security Utility on the Recovery partition. Once you’ve booted from your Mojave Installer drive, use Disk Utility to erase the entire internal drive. Then install Mojave.
Use Virtualization to Keep 32-bit Apps Running
For some people, what’s keeping them on Mojave is a single 32-bit app that will never be updated in an appropriate fashion. Quicken 2007 falls into this category, as does the ScanSnap Manager app for the ScanSnap S1300, S1500, and S1500M scanners. Sure, you can get a current version of Quicken, but it may not do precisely what you want, and Fujitsu would be happy to sell you a new ScanSnap scanner that does come with 64-bit software, but then you’ll have to figure out what to do with your old scanner.
So if you’re ready to upgrade to Catalina in general but need to maintain access to one or two apps, one solution is virtualization software: either Parallels Desktop or VMware Fusion. Both apps let you run nearly any operating system—including older versions of macOS like Mojave—in a virtual machine. In essence, they fool the guest operating system, whether it’s Mojave or Windows, into thinking it’s running normally on a computer when it’s actually running in a virtual environment.
These apps cost about $80, and while there’s a bit of work in setting them up (the screenshot below shows the option for installing Mojave in Parallels Desktop during setup), once you have them configured, it’s easy to run older apps alongside newer ones with little or no performance hit. This approach is also perfect for a 16-inch MacBook Pro or Mac Pro that can’t run Mojave in any other way.
Install Catalina and Mojave on Separate APFS Volumes and Switch Boot
Finally, there’s one other option that lets you switch back and forth between Mojave and Catalina, assuming your Mac supports Mojave. You can create an APFS volume on your internal drive and install another version of macOS on that. It’s easy, and Apple provides full instructions. The only problem with this approach is that you’ll have to restart to switch operating systems, whereas both are available simultaneously with the virtualization solution.
First, make sure you have at least one current backup of your Mac, since it’s foolhardy to adjust your drive structure without one. Next, in Disk Utility, select your internal drive, choose Edit > Add APFS Volume, and click Add. We recommend naming the drive such that it will be clear what’s on it.
Command-R reinstalls the latest version of macOS that was installed on your Mac.
Command-Option-R upgrades to the latest version of macOS that’s compatible with your Mac.
Command-Shift-Option-R reinstalls the version of macOS that came with your Mac, or the closest version still available.
Choose Reinstall macOS from the macOS Utilities window and proceed from there.
Once the installation is complete, to switch from one version of macOS to another, open System Preferences > Startup Disk, choose the desired volume to boot from, and then click Restart. Or, press Option at startup and select the desired volume from the Startup Manager screen.
Needless to say, the decision about when and how to upgrade to Catalina isn’t a trivial one, so feel free to contact us to discuss your particular situation or to get help with any of the procedures that we’ve described in this article.