Hi all,
Twinmotion 2025.1.1 is becoming unusable on my setup. The app crashes randomly—sometimes the moment I click any button, other times after a few minutes of light work. In the last 30 minutes alone it has quit three times, always showing the same low-level thread-stall stack trace:
LoginId: 678a6b4ab7475948ab810ea9862869f0
EpicAccountId: 0a5c87032ef34feb87195f7b5c3bcdf2
Unknown() 0x18faf43cc [libsystem_kernel.dylib]
FPThreadEvent::Wait 0x11180db80 [TwinmotionCookedEditor-Mac-Shipping]
LowLevelTasks::FScheduler::StandbyLoop 0x1117b41f8
LowLevelTasks::FScheduler::WorkerMain 0x1117b5538
FThreadImpl::Run 0x111888760
FRunnableThreadPThread::Run 0x11184e1b4
FRunnableThreadPThread::_ThreadProc 0x11181ef4c
Unknown() 0x18fb32c0c [libsystem_pthread.dylib]
Unknown() 0x18fb2db80 [libsystem_pthread.dylib]
What I’ve already tried (with zero success)
- Deleted
~/Documents/Twinmotion 2025/Config
. - Verified and fully re-installed Twinmotion via Epic Games Launcher.
- Started with Shift-launch (no project auto-load) and ⌥-launch → Raster mode only.
- Cleared asset & thumbnail caches.
- Updated to macOS 15.5, rebooted, tested in High-Power battery mode and on mains.
Same random crashes—no pattern except that they happen whenever I interact with the UI.
System details
Macbook pro 16, M4 Pro, 48Gb ram, 512Gb. High power plan.