Downgrade a new Mac from OSX 10.14 to 10.11?
68614
Is it possible to install an old version of Mac OS on a new Mac?
31268
Revert to El Capitan
87906
Why does OS X want me to "upgrade" from El Capitan to Yosemite Beta 4?
121309
How to downgrade from El Capitan to Snow Leopard?
69161
Is there a way to virtualize Mac OSX in Windows?
3612
Can I downgrade to Mavericks after installing Yosemite (beta/developer preview)?
33651
How to upgrade from Ubuntu 12.10 to 14.04
105231
How to downgrade a package using dpkg
22617
Downgrading from Safari 12 (beta) to Safari 11
71865
How to download MacTeX 2011 now that MacTex 2012 is available
27831
Can't downgrade database from version 2 to 1
43279
Alternative Method to Acquire El Capitan Upgrade
151232
downgrading rails 4 to 3.2
86088
What version do I download for my Mac?
22276
How do I downgrade Firefox v. 57 to v. 56?
135981
How do I reinstall macOS to my Mac after formatting the main drive accidentally?
94417
How to transfer code from old version of xcode to the newest verision?