A problem from the first 128K Mac, virtual memory was available from 1987 but only with A/UX. It wasn’t really sorted out until Mac OS X, and now it’s all Unified anyway.
Unified Memory
Managing memory and its problems was an important part of running Classic Mac OS, but everything changed in Mac OS X. Do we still need apps to do that?
Memory, from L1 instruction cache to main memory, and how it came to be Unified. Why the internal SSD isn’t like others, and why it’s so essential.
With Unified memory, don’t you simply add the main and graphics memory sizes from your Intel Mac to determine how much your Apple silicon Mac needs?
How to interpret various measurements reported in Activity Monitor, from % CPU to Energy Impact, and how they can be compared across different Macs.
All about memory: different types, Unified Memory, Mach zones and the kernel, and how to manage system memory problems.
How can you tell how much memory is being used by the GPU when both CPU and GPU use Unified Memory? Does it matter anyway?
The Eclectic Light Company 