What OS upgrade from OS Sierra for iMac retina 5k end 2014 ?
I have not done any upgrade for my iMac, and it states to become a problem for some softwares (including safari). What is the best solution taking into account my current machine (iMac 27 p, retina 5k, end 2014, processor 3,5 ghz I5, 24 Go, 1600 Mgz DDR3
iMac 27″, macOS 10.12