CleanMyMac 3 works on macOS 10.9 and higher. There are five operating systems that match CleanMyMac 3 system requirements: Mavericks (OS X 10.9), Yosemite (10.10), El Capitan (10.11), macOS Sierra (10.12), and macOS High Sierra (10.13). High Sierra is newer, free, and has more valuable features. Therefore, we highly suggest upgrading your Mac to macOS 10.13.
You can install High Sierra on one of the following Macs:
Also, note that your Mac must have at least 2 GB of RAM (preferably 4 GB) and 8 GB of free disk space on the drive. If you aren't sure about these numbers, let's check them right now.
Follow these steps to find out how much memory your Mac has:
The amount of RAM you have is specified on the first tab, Overview. Just look at the Memory line and check if there's more than 2 GB. If not, you need to consider upgrading your RAM before installing a new operating system.
Now, let's check free disk space:
The amount of available space on your drive is specified right under its name. If you have more than 14.3GB, cool, you’re good to go.
When you install your new OS, you have to restart a Mac. So, be sure to add this page as a bookmark before downloading and installing your new OS. That's what you need to do to add a bookmark :
Now that you’ve bookmarked this page, download macOS High Sierra from the App Store, follow the instructions, and then reboot your Mac.
When your Mac is done installing your new macOS, load this web page and continue from the next section.
If you’d like to do a clean install of macOS High Sierra, check out this article; it’ll walk you through the entire process.
Now, you’ve upgraded your system, just click this link to head to the MacPaw Store and upgrade to CleanMyMac 3.
Clean, optimize, and maintain your Mac with the all-new CleanMyMac 3. It scans every inch of your system, removes gigabytes of junk in just two clicks, and monitors the health of your Mac.