So, you've decided to download an older version of Mac OS 10. In that location are many reasons that could indicate yous to this radical determination. To begin with, some of your apps may not be working properly (or simply crash) on newer operating systems. As well, you may have noticed your Mac's performance went down right after the last update. Finally, if you want to run a parallel copy of Mac OS X on a virtual machine, you too will demand a working installation file of an older Mac OS 10. Farther downwardly nosotros'll explain where to become one and what problems you lot may face downwardly the road.

A listing of all Mac OS X versions

We'll be repeatedly referring to these Apple Os versions beneath, so it'south good to know the basic macOS timeline.

Cheetah 10.0 Puma 10.1 Jaguar 10.2
Panther x.3 Tiger 10.4 Leopard 10.5
Snow Leopard 10.6 Lion ten.vii Mountain Lion 10.viii
Mavericks 10.9 Yosemite 10.ten El Capitan x.11
Sierra 10.12 High Sierra ten.13 Mojave 10.14
Catalina 10.xv

STEP 1. Fix your Mac for installation

Given your Mac isn't new and is filled with data, you will probably need enough free space on your Mac. This includes non only space for the OS itself but also space for other applications and your user data. One more argument is that the gratuitous infinite on your disk translates into virtual retentiveness and so your apps take "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. Next, you will demand enough disk space available, for example, to create Recovery Partitioning. Here are some ideas to gratuitous up space on your drive:

  • Uninstall big unused apps
  • Empty Trash Bin and Downloads
  • Locate the biggest files on your figurer:

Go to Finder > All My Files > Conform by size

Then you tin can move your space hoggers onto an external drive or a cloud storage.

If you aren't comfy with cleaning the Mac manually, in that location are some overnice automatic "room cleaners". Our favorite isCleanMyMac every bit information technology'south most unproblematic to apply of all. Information technology deletes system junk, old broken apps, and the rest of hidden junk on your bulldoze.

CleanMyMac X - Smart Scan complete

Download CleanMyMacfor Bone 10.iv - 10.8 (gratis version)

Download CleanMyMac for OS 10.9 (free version)

Download CleanMyMacfor Bone 10.x - x.14 (free version)


Step ii. Get a re-create of Mac Bone X download