Sure, I’ll try rerunning the commands and take pics of the installer errors. When I run the commands, it says there is not enough space though, because I’m only able to try ZORIN OS
The iMac has:
Processor: 2.7 GHz i5
Ram: 4 GB 1333 MHz DDR3
Graphics / Video Card: AMD Radeon HD 6770M 512 MB
More detailed info about my iMac here: iMac 27-Inch "Core i5" 2.7 (Mid-2011) Specs (Mid-2011, MC813LL/A, iMac12,2, A1312, 2429): EveryMac.com
Thanks for your help! Sorry for the late reply by the way.
Update: Forgot to mention that I erased the Macintosh drive with MacOS and reformatted it as MacOS Extended (Journaled). Also, part of the drive is partioned with Windows installed.