How can I upgrade OS X.11 to OS X.12 when the App Store only offers OS X.13
4309
How can I download an older version of OS X/macOS?
36703
How do I upgrade from 12.10 to 13.04?
107546
App Store asks for old Apple ID when installing updates
117374
Where to get Mavericks (or older) OS X installer apps to set up Virtual Machines?
38590
How do I suppress the "New release '12.10' available" message?
87984
Can I fresh install a Beta version of macOS?
60029
Which macs are compatible with OS X 10.11 El Capitan?
102362
Install older OS X on latest Mac Mini
123634
Can't update Xcode
128793
Can I have multiple Xcode versions installed?
34371
Can I force an iPhone user to upgrade an application?
96883
How do I install Xcode on Ubuntu?
19288
Update manager doesn't offer an upgrade to the new release
71865
How to download MacTeX 2011 now that MacTex 2012 is available
93193
This copy of the Install OS X El Capitan application can't be verified. It may have been corrupted or tampered with during downloading
113056
How to upgrade from 12.04 to 12.10 using CD?
22617
Downgrading from Safari 12 (beta) to Safari 11