This is the term Apple used when the company announced its plan for future Mac computers to come powered by its own system-on-a-chip. The newest MacBook laptops and Mac mini desktop are powered by Apple Silicon. Whether this a hard line, a technical impossibility, or simply a very difficult and unsupported process was not known until recently. However, once the choice is made, the official statement is that there is no possibility of an upgrade. When purchasing an M1 Mac from Apple or from another retailer, there are options to choose more or less memory and greater or smaller storage capacities.
