Maximum Apple supported macOS for your 2011 iMac is High Sierra (10.13.6), but minimum OS to upgrade is 10.8. You will need a 2 step process to get to High Sierra. If you’re running any release from macOS 10.13 to 10.9, you can upgrade to macOS Big Sur from the App Store. If you’re running Mountain Lion 10.8, you will need to upgrade to El Capitan 10.11 first. If you don’t have broadband access, you can upgrade your Mac at any Apple Store. Learn more about how to upgrade. The improved retouch tool in Photos requires MacBook Pro (15-inch and 16-inch models) introduced in 2016 or later, MacBook Pro (13-inch models) introduced in 2020, MacBook Air introduced in 2020, iMac (Retina 5K models) introduced in 2014 or later, iMac (Retina 4K models) introduced in 2017 or later, iMac Pro (all models), Mac mini introduced. Why Should We Upgrade to macOS High Sierra? Apple released the latest macOS, High Sierra, and added some new features including a new and improved Apple File System (AFPS), a faster browser, stellar graphics, better gaming capabilities and VR support. MacOS 10.13 is absolutely worthwhile to upgrade your Mac. MacOS High Sierra System Compatibility.
Is your Mac up to date with the latest version of the Mac operating system? Is it using the version required by some product that you want to use with your Mac? Which versions are earlier (older) or later (newer, more recent)? To find out, learn which version is installed now.
If your macOS isn't up to date, you may be able to update to a later version.
Upgrade Mac 10.13 To 10.14
Which macOS version is installed?
From the Apple menu in the corner of your screen, choose About This Mac. You should see the macOS name, such as macOS Big Sur, followed by its version number. If you need to know the build number as well, click the version number to see it.
Which macOS version is the latest?
Mac Update 10.13.6 Won't Install
These are all Mac operating systems, starting with the most recent. When a major new macOS is released, it gets a new name, such as macOS Big Sur. As updates that change the macOS version number become available, this article is updated to show the latest version of that macOS.
Mac Update 10.13
If your Mac is using an earlier version of any Mac operating system, you should install the latest Apple software updates, which can include important security updates and updates for the apps that are installed by macOS, such as Safari, Books, Messages, Mail, Music, Calendar, and Photos.
Mac Update 10.13.6
| macOS | Latest version |
|---|---|
| macOS Big Sur | 11.2.3 |
| macOS Catalina | 10.15.7 |
| macOS Mojave | 10.14.6 |
| macOS High Sierra | 10.13.6 |
| macOS Sierra | 10.12.6 |
| OS X El Capitan | 10.11.6 |
| OS X Yosemite | 10.10.5 |
| OS X Mavericks | 10.9.5 |
| OS X Mountain Lion | 10.8.5 |
| OS X Lion | 10.7.5 |
| Mac OS X Snow Leopard | 10.6.8 |
| Mac OS X Leopard | 10.5.8 |
| Mac OS X Tiger | 10.4.11 |
| Mac OS X Panther | 10.3.9 |
| Mac OS X Jaguar | 10.2.8 |
| Mac OS X Puma | 10.1.5 |
| Mac OS X Cheetah | 10.0.4 |