Aging iMac needed a caffeine shot. Maxed our memory and upgraded spinning disc with SSD. Like a brand new family computer again!
Replaced the stock (x2) 4GB SO-DIMMS with (x2) 8GB, and 1TB spinning disc with a 512GB Crucial SSD. Offloaded bulk of iTunes library (400+GB by itself) to my NAS.
The proc . . .