

Further down we’ll explain where to get one and what problems you may face down the road. We’ll be repeatedly referring to these Apple OS versions below, so it’s good to know the basic macOS timeline. Given your Mac isn’t new and is filled with data, you will probably need enough free space on your Mac. This includes not just space for the OS itself but also space for other applications and your user data. One more argument is that the free space on your disk translates into virtual memory so your apps have “fuel” to operate on. The chart below tells you how much free space is needed.

Note, that it is recommended that you install OS on a clean drive. Go to Finder > All My Files > Arrange by size Locate the biggest files on your computer.Here are some ideas to free up space on your drive: Next, you will need enough disk space available, for example, to create Recovery Partition. Then you can move your space hoggers onto an external drive or a cloud storage. If you aren’t comfortable with cleaning the Mac manually, there are some nice automatic “room cleaners”. Our favorite is CleanMyMac as it’s most simple to use of all.
