A:AnswerI am not sure. Mine came standard with 8 GB and I upgraded to 16 before they shipped it to me but I didn’t ask about 32. I do know that the larger screen iMac could not be upgraded to 16GB. This is a good question for the geek squad
A:AnswerNot like the OLD iMacs. But there is a headphone jack, so if you have the right plug it can be done.
I have Altec Lansing system connected to mine.