Last week, Apple marked the iMac Pro as available “while supplies last.” When current supplies run out, that’s it. The first and only iMac Pro, Apple’s best iMac ever, which has only been available since 2017, will be ready.

The iMac Pro ended up as an interim Mac, a stopgap solution to tide pro users over until the current Mac Pro arrived last year. But it was far from rushed. The Mac Pro may have looked like a regular iMac with a cool Space Gray paint job, but inside its chassis, it was incredible. So, what’s next?

"I think we can expect a lot more processing power, which will be incredibly useful for people who work with graphics or modeling programs that require a lot of memory to run simultaneously," Rex Freiberger, managing partner of Gadget Review, told Lifewire via email.

There’s a faction of the car-modding community that takes regular cars and upgrades the engine, suspension, and brakes, turning them into little road rockets. That’s the iMac Pro. On the outside, it looked like a regular iMac, with its decade-plus old chassis, but on the inside, it was a completely different computer.