My guess, the release cycle Apple would like is:<p><pre><code> * SEPTEMBER (iPhone)
- iPhone Pro get new/latest chip every year
- iPhone non-Pro, get last year Pro chip (netting 2-year cycles for their mobile chips)
* MARCH (Mac)
"Pro"
- MacBook Pro, every 2-years
- MacStudio, every 4-years (always on the same MacBook Pro year)
"Consumer"
- MacBook Air, every 2-years (one year behind the Pro year)
- iMacs, every 4-years (always on the same MacBook Air year)</code></pre>