The Mac Pro (M2 Ultra) tops out at 192GB — and you must choose before you buy

192GB of unified memory is the ceiling for the Mac Pro (M2 Ultra), and it’s an order-time decision — there’s no popping open the case later. Apple’s unified memory architecture means the RAM is part of the M2 Ultra package itself, so whatever you configure at purchase is what you’re stuck with. Choose carefully: 192GB is plenty for most video workflows, but if you know you’ll need more, the Mac Pro won’t be the right machine.