Rhino 8 Osnap bug in full window view after updating to macOS Tahoe 26.0

Rhino Rhino for Mac
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RH-89546 is fixed in Rhino 7 Service Release 39 Release Candidate

42

Hello,

I’m still experiencing an object snap accuracy issue after updating to the latest Service Release.

System:

  • Rhino 8.33 (Mac)
  • Mac Mini 2023
  • macOS Tahoe 26.5.2

Issue:
When zoomed in closely and trying to snap one segment onto another at an intersection point (using the Int osnap), the target marker appears to indicate a precise snap location. However, after clicking, the resulting point is visibly offset from the actual intersection — the two segments end up misaligned rather than joined at the same point.

Steps to reproduce:

  1. Zoom in closely on two intersecting/adjacent line segments
  2. Enable Intersection (Int) osnap
  3. Hover near the intersection — the snap marker appears at the expected location
  4. Click to snap — the resulting endpoint is offset from the true intersection

I saw this may be related to RH-89546 (Cursor tracking stops working during command), which was reported as fixed in the 8.24 Service Release Candidate — but I’m still reproducing a similar offset behavior in 8.33 on macOS Tahoe 26.5.2. Wanted to flag that the issue may not be fully resolved for all cases, or that this could be a related but distinct regression.

Happy to provide a screen recording or sample file if useful.

Thanks!