User level: Level 1 (4 points)Is the iPhone 17 Pro Max Silicone Case with MagSafe compatible with the iPhone18 Pro Max?
[Re-Titled by Moderator]
Original Title: iPhone Case Compatibility
Posted on Sep 18, 2026 2:52 AM
User level: Level 10 (169,253 points)Sep 18, 2026 5:57 AM in response to cherry-tree
Officially, no. Not compatible.
The iPhone 18 Pro camera plateau is reportedly a tenth of a millimeter higher, but dimensions are otherwise the same.
Per John Gruber: ”I asked Apple if they’re stating that 18 Pro models are case-compatible with the iPhone 17 Pro, and they are not, because the 18 Pro camera plateaus are slightly thicker this year. I measured with a digital caliper and the difference is one-tenth of a millimeter: 11.5mm vs. 11.4mm. So Apple has raised the plateau guard lip on its own 18 Pro cases by one-tenth of a millimeter.”
User level: Level 10 (334,506 points)Sep 18, 2026 5:32 AM in response to cherry-tree
While the iPhone 17 Max and iPhone 18 Max have the same overall physical dimensions, Apple differentiates its own cases for these two models of iPhone. Cases designed for either model do not state compatibility with the other.
This differentiation might reasonably suggest that these cases are not interchangeable between the iPhone 17/18 models due to other less obvious physical differences between these iPhones - such as, perhaps, changes to the camera plateau that incorporate the camera system.
As such, you would be wise to assume that cases designed for the iPhone 17 Max are incompatible with the new iPhone 18 Max.
User level: Level 1 (4 points)Sep 21, 2026 7:39 AM in response to MrHoffman
Thanks for that, 1/10th mm = approx 4 thou of an inch! That is less than the width of a human hair.
Well my case for the iPhone 17 Pro Max fits just fine.
Originally posted at discussions.apple.com/thread/256359578