The more memory, the faster it goes.
The 64GB and 128GB machines people buy to run local models are not the ones that linger. They are the first to disappear. Share of restocks we tracked that sold out within 15 minutes of listing:
Mac Studio M3 Ultra is the 96GB and up tier. The 128GB share is even higher in the subset where we captured the exact memory spec (small sample, 13 restocks), so we lead with the robust family and chip cuts here.
How long each model lasts
Time in stock from listing to the first moment we saw it out of stock. We report medians and the share sold within set times, not averages, so a few maxed-out storage builds that sit for days do not skew the picture.
| Model | Restocks | Median in stock | Gone in 15 min | Gone in 1 hr |
|---|---|---|---|---|
| Mac Studio | 99 | 4.5 min | 78% | 99% |
| Mac mini | 138 | 30.5 min | 26% | 80% |
| MacBook Air | 251 | ~2 hr | 25% | 43% |
| MacBook Pro | 241 | ~4.6 hr | 29% | 35% |
| iMac | 114 | ~18 hr | 30% | 32% |
| All Macs | 843 | 57.5 min | 33% | 52% |
When restocks actually happen
Stock does not drop at random. It clusters on weekday afternoons and evenings, Eastern Time, and peaks around 9 PM. Sundays are nearly dead.
Peak: 9 PM ET. A heavy afternoon block from 2 to 5 PM, then a second surge into the evening.
Busiest: Thursday, Wednesday, Tuesday. Sunday is nearly dead.
How we measured this
SourceRefurbSitter polls Apple's US refurbished store continuously and records each configuration's stock state over time. Time in stock is the gap from listing to the first out-of-stock reading.
WindowJune 3 to 26, 2026. Sell-out timing is measured on the 843 restocks with continuous in-stock coverage. One window; patterns can shift month to month.
GrainFamily-level numbers are well sampled. Exact memory is identified by Apple's part number, not the listing title, so we report by family and chip rather than per single config.
Not a guaranteeThese are recorded observations of past restocks, not a prediction of future speed or timing. You buy on apple.com; we never touch your cart.