Guys I have two iMacs here, one is a 21.5 Intel Core i3 Mid-2010 with 8gb and High Sierra 10.13.6 with 66gb available on a 500gb standard drive. It randomly freezes for 10 seconds and recovers by itself, one to five times a day. It also beeps and restarts, very random, up to three times a day. Twice it started beeping middle of the night in Sleep Mode, unresponsive, had to pull the power cord. We copied everything onto a spare machine, a late 2009 Intel Core 2 Duo, also 8gb//500gb. It ran perfect for days, then we copied over to it, now IT is freezing like the first machine (no restarts yet). Did I copy my problem into the second machine? Do I have some conflicting apps? How can I determine? Is there a crash log hidden somewhere? How do I resolve these problems? I have a guy available, more of an iMac geek than me, and he hasn't suggested much.