My wonderful old 2003 G4 iMac wasn't very useful under OS X any more, but the "sunflower" design is too cool to abandon, so I took the leap to Ubuntu Mate. No problems getting the system installed from the iso file, but I can't get it configured for sound and wifi.
I'm not very good with Linux, but I follow precise instructions well...I did find prior posts on these subjects (none in the past couple of years, interestingly) but don't know enough to apply what I found.
Sound: I found alsamixer and am able to unmute the Master, but still no sound. In case it matters, the Headphone and Speakers indicators have a small box with "00" in them, but no bar indicating level like the Master.
Wifi: I think I have a Broadcom wifi device. A bootup message flashes by about needing a driver, but too fast for me to copy down (and I've no idea where such messages are logged or how to access them). I've found instructions for resolving this online, but none were written at a level I was capable of following.