No power. iMac won’t turn on.My iMac won’t turn on. No power..
Responder a: Suggestion for upgrading iMac 21.5inch late 2015Buy an external Samsung Portable SSD. Use it as a usb startup bootable drive. I bought the T5 500GB drive for $127.00 from Amazon. I increased my system's disk speed from 82 MB/s write & 92 MB/s read, to 420 MB/s write & 460MB/s read.