macOS High Sierra

Maybe you've been testing macOS High Sierra in beta for months. Maybe you wanted to be surprised with all the new features on launch day. Unless something goes wrong, macOS High Sierra will be available September 25 as a free upgrade. Get your Mac ready for the big update by checking off everything you need to prepare for a smooth update.

Step 1: Make sure your Mac is compatible with macOS High Sierra

macOS High Sierra is compatible with the following laptop and desktop computers:

  • iMac (Late 2009 & later)
  • MacBook Air (2010 or newer)
  • MacBook (Late 2009 or newer)
  • Mac mini (2010 or newer)
  • MacBook Pro (2010 or newer)
  • Mac Pro (2010 or newer)

There are a few features that won't work with some older devices. You'll have to decide whether you want to update to macOS High Sierra based on what your Mac is compaitble with.

You can update directly to macOS High Sierra if you are running OS X Lion (10.7.5) or newer. Just download it from the Mac App Store.

Step 2: Check your app updates

Outdated apps on Mac are just as much of a problem as outdated apps on iPhone, sometimes more if you use your Mac for work. Check with app developers via their website or social networking sites like Twitter to make sure they will support macOS High Sierra. Some changes to the Mac operating system might make your favorite apps bug out a little (or a lot). If a developer isn't supporting macOS High Sierra or hasn't released an update, you can stick with macOS Sierra until it's safe. You can also partition your Mac and install High Sierra along side your current OS.

Step 3: Clean up your Mac

macOS High Sierra doesn't take up a lot of space, but you should make sure you've got a few GBs of free space to download and install the update with maximum efficiency. If your Mac is bloated with duplicate photos, extraneous files, or unneeded apps, you might want to clean it up to make space for the download.

Even if you have plenty of space on your Mac, it's never a bad idea to keep it organized and tidy by cleaning up your desktop, clearing out your downloads folder, and emptying your trash.

Step 4: Back it up!

I can't stress this enough. You should always back up your data before downloading any major updates. If you don't set up some backup system, you only have yourself to blame if you lose all of your data.

If you are running a beta version of macOS High Sierra

Those installing macOS High Sierra for the first time will have the easiest time downloading the update. All you have to do is click the Download button for it in the Mac App Store and follow the instructions to install it.

If you've been running the public or developer beta, you should be able to just run the High Sierra installer. The final build of macOS High Sierra should be the same as the Gold Master beta. You may have to backup, erase, and reinstall the software (another reason why you need to backup!) if something goes wrong.

If you partitioned your hard drive to test macOS High Sierra

You may have decided to partition your Mac in order to test drive macOS High Sierra so as not to mess with your daily driver. If so, you may have built up a number of files that you'd like to save. Make sure you back up the data on your secondary partition to make sure you don't lose anything important.

It isn't a bad idea to keep a partition, especially if you are a fan of beta testing. But, you might need to free up space on your Mac. If so, you should remove the partition.

Decide whether to do a clean install of macOS High Sierra or carry over your current settings.

Some people prefer erasing their hard drive and starting over from scratch. With so many cloud-based storage services, it's much easier than it used to be to do a clean install of an operating system on Mac. But, you have to think about the affect it will have on your immediate workflow before making such a major change.


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