Describe the issue
I'm running UTM 5.03 (Beta) on macOS Tahoe 26.5.1 and used a Windows 11 ARM that has not been stopped for a log time (at least a week). So the VM was on for this time. This morning, macOS displayed a message about the system is running out of memory.
In fact, UTM was hooking about 98GB on a Macbook Pro with 16GB physical RAM. Stopping the Windows VM freed about 2 GB but the UTM backend was still using 96 GB.
Recovering the memory was only possible by closing UTM
The Windows 11 ARM is 25H2 with the latest patches (June 2026)
Configuration
- UTM Version: 5.0.3 (Beta)
- macOS Version: macOS Tahoe 26.5.1
- Mac Chip (Intel, M1, ...): Apple Silicon M1 Pro
Crash log
No Crash log
Debug log
debug-memory usage.log.zip
Describe the issue
I'm running UTM 5.03 (Beta) on macOS Tahoe 26.5.1 and used a Windows 11 ARM that has not been stopped for a log time (at least a week). So the VM was on for this time. This morning, macOS displayed a message about the system is running out of memory.
In fact, UTM was hooking about 98GB on a Macbook Pro with 16GB physical RAM. Stopping the Windows VM freed about 2 GB but the UTM backend was still using 96 GB.
Recovering the memory was only possible by closing UTM
The Windows 11 ARM is 25H2 with the latest patches (June 2026)
Configuration
Crash log
No Crash log
Debug log
debug-memory usage.log.zip