The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
Availability date from Apple's[2] own newsroom announcement (https://www.apple.com/newsroom/2026/08/apple-introduces-new-mac-studio-with-m5-max-and-m5-ultra/): pre-orders from August 25, 2026, and it 'will begin arriving to customers, and in Apple Store locations and Apple Authorized Resellers, starting September 22'. September 22, 2026 is the shipping/on-sale day.
Apple's[1] Mac Studio tech-specs page gives the M5 Max "18-core CPU with 6 super cores and 12 performance cores" at 460GB/s, the M5 Ultra's 30-core CPU and 1.2TB/s bandwidth, the 7.7 x 7.7 x 3.7 inch size and Thunderbolt 5 ports.
MacRumors' 25 August 2026 piece is about the Mac mini; it confirms the Mac Studio was unveiled the same day only in passing ('unveiled alongside a new Mac Studio'), so it dates the unveiling but says nothing else about this product.
Macworld's own coverage of the 2026 Mac Studio M5 Max/Ultra reports the line was announced August 25, 2026 with shipping beginning September 22, 2026 (512GB configs arriving in late October) - later than the pin's stored September 8, 2026 date, consistent with the pin's "unknown" dateConfidence.
Something missing or wrong? Say it in your own words: a link that backs this pin up, a different start or end date and why, or a fact it lacks or gets wrong. The AI checks it against this pin's sources, searches for better ones, and adds any page that backs you up. The pin's own sources still count most. A picture that shows something else, or shows it badly, is looked at too, and moved down or replaced.