Failing to install Ubuntu on an old Mac
4251
How do I get my Mac to boot from an Ubuntu USB key?
153359
Wiped out OSX (Mac Air), to install Ubuntu 13.10 which doesn't boot
126915
Upgrading an old mac mini intel 1.1 for Lion
69941
How do I install Ubuntu on a second hard drive?
66685
Installing Ubuntu on one of two hard drives
103541
Installing Ubuntu on a single partition
4309
How can I download an older version of OS X/macOS?
61415
Mac stuck in "El Capitan" installer loop: "no packages were eligible for install"
22691
Install Ubuntu on Intel Mac
46316
Mac OSX update broke booting Ubuntu
1520
How to install software or upgrade from an old unsupported release?
29705
"errno 5 - input/output error" when trying to install Ubuntu
5882
How to upgrade Ubuntu from an ISO image
141372
OS X El Capitan and older not available on App Store?
38518
Macbook Air - how to install a dual bootable Ubuntu 14.04 LTS
81492
Installing ubuntu besides windows 8
149786
How to restore Mac OS X on a new hard-drive?