mojave upgrade
My mid-2010 iMac runs a 2.8 GHz Intel Core i5 and has 4GB of memory. It was upgraded to a 1TB SSD awhile back, and is running High Sierra without any glitches. Yet I cannot upgrade now to Mojave. Is this because of my serial number showing mid-2010?
iMac, macOS High Sierra (10.13.6)