For those of us with older Intel based Mac computers you might have come across the fact that the 64bit ISOs will not boot on these machines leaving you stuck at a black screen that you can't select boot 1 or 2. I have made the following ISOs for Ubuntu MATE 64bit that will boot and install without this issue.
The machines this should work on are:
iMac 5,1 – iMac 5,2 – iMac 6,1
Macbook 2,1
MacBook Pro 2,1 – MacBook Pro 2,2
Mac Pro 1,1 (only one I can test)
If you're interested in how I did this I used and compiled the C program HERE following the guide HERE. It is a pretty simple thing to do and plan on doing it for all releases of Ubuntu MATE until it either doesn't work or performance on these systems suffers to the point of being unusable.
Ubuntu MATE 18.04.1 LTS: https://drive.google.com/open?id=1HukNfUfkn3uYA1rmLw5OWRDYZMssbk26
Torrent: https://drive.google.com/open?id=1ATBT48VSXbylbNQr45jTsTlwhn9FGaLw
SHA256SUM: 8433e0f4a5027107775f0ac6ce1c86c6f1de12e7d61eaae04e2493d4b6cb6701
Ubuntu MATE 18.10: https://drive.google.com/open?id=1tMJg3JXDUwUIKWombuI-swyaVbTQEmjy
Torrent: https://drive.google.com/open?id=1rt8CDWHozjCZ4t2zDlPEA9HXrTryrs_U
SHA256SUM: 4dd43ba186602c37e8aaf632a6786a646c79fe7a0cb4bbfa1ea718d5fa2bc004
Ubuntu MATE 20.04 AMD64+MAC: https://drive.google.com/open?id=1JcE4IV_OZyYBWgF9tKZsjmUf3nDb1Gd_
If there are any questions or requests for certain distros please let me know and I will answer them as soon as I am able to. Please note that these are not official images but just those I made for myself and want to share for those who might find them helpful.
-KTrad