Upgrade to High Sierra
4309
How can I download an older version of OS X/macOS?
98421
How will people upgrade from 12.10 to later releases after 13.04 is EOL?
12273
Why do I get a ‘Remote Management’ step when installing High Sierra?
36892
Upgrading from Yosemite to El Capitan, but not Sierra
133599
Is anyone else having problems with using htop on High Sierra?
114305
On really old Ubuntu 6.06 - How to upgrade
43975
High Temp at Startup after Upgrading to High Sierra
54472
How to reinstall macOS Sierra after formatting by Ubuntu
79327
How do you perform a clean install of macOS High Sierra with APFS?
130271
How can I install java openjdk 8 on High Sierra or newer macOS
114664
Old version (macOS Sierra) for Pages, Keynote and Numbers, iWork
31948
Roll back from OS X Mavericks ( or any newer OS) to Mountain Lion
10709
Can i upgrade ubuntu without losing my apps and files?
67320
CPU upgrade on MacBook Pro
121309
How to downgrade from El Capitan to Snow Leopard?
67359
Upgrade to the latest PHP version in Ubuntu
38407
Allow applications downloaded from anywhere in macOS Sierra