FreeCAD/FreeCAD

macOS: v1.1.1 seems not to support Apple Silicon M5 on MacBook Air

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#30007 opened on May 9, 2026

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Help wantedOS: macOSStatus: ConfirmedType: BugType: CrashType: Regression

Description

Problem description

Fantastic software - Thank you - but it seems not to support Apple Silicon M5 on MacBook Air yet - FreeCad 1.1.1 crashes every time I try to make even simple operation on my MacBook - whereas it is running quite stable on my Windows machine. It's a brand new MacBook Air M5 running macOS Tahoe 26.4.1 and FreeCad 1.1.1 was the first app I installed. It crashes after a few seconds in Part and PartDesign after a few operations - it also crashes in safe mode. I get some strange notifications (invalid index ....) - Please see attached screendump

Workbench affected?

Part

Steps to reproduce

Not possible to attach zip due to crash

Expected behavior

running without crashes 😊

Actual behavior

FreeCad 1.1.1 crashes after a few seconds and very few operations - seen in Part and PartDesign. It also crashes in safe mode and also with the OpenGL option checked. Please see attached screendumps

Development version About Info (in Safe Mode)

Not tried yet - but I will

Last known good version (optional)

Contributor guide

Tech stack
cpp
Domain
desktop
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
5
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
over 1 week
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
macOS M5 systemC++FreeCAD build setupdebugging
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
20
Research direction
Investigate the 'invalid index' errors from the attached screenshots; likely a memory corruption or uninitialized pointer in Part or PartDesign workbench. Check recent commits in FreeCAD's source for changes that might affect Apple Silicon, and compare with known issues on M1/M2. Request maintainer for detailed crash logs or core dumps to locate the crash point.