As someone who tinkers with older Macs, I often forget which versions of Mac OS X are earlier or later just based on name, so for future reference here’s a quick list (summarized from wikipedia):
| 10.0 | Cheetah |
| 10.1 | Puma |
| 10.2 | Jaguar |
| 10.3 | Panther |
| 10.4 | Tiger |
| 10.5 | Leopard |
| 10.6 | Snow Leopard |
| 10.7 | Lion |
| 10.8 | Mountain Lion |
| 10.9 | Mavericks |
| 10.10 | Yosemite |
| 10.11 | El Capitan – most recent version that can be installed on my 2008 Mac Pro 3,1 without using DosDude’s Patcher or OpenCore Legacy Patcher etc |
| 10.12 | Sierra |
| 10.13 | High Sierra |
| 10.14 | Mojave |
| 10.15 | Catalina |
| 11 | Big Sur |
| 12 | Monterey |
| 13 | Ventura |
| 14 | Sonoma |
| 15 | Sequoia |
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