Metal - Preview window drops to single digit framerates + OBS eventually crashes

Operating System Info

macOS 26.2 on M4 Pro Macbook Pro w/24GB RAM

OBS Studio Version (Other)

32.0.4

OBS Studio Log URL

https://obsproject.com/logs/GiXl2wBCXpsf2k1R
https://obsproject.com/logs/IehJJT6OhJ9L8SWY

OBS Studio Crash Log URL

No response

Expected Behavior

Preview window should not stutter. OBS should not crash.

Current Behavior

I switched my renderer to Metal from OpenGL.

I fired up my livestream. I noticed some dropped frames right from the getgo but it wasn't critical. However...

I accidentally moved the OBS window maybe a centimeter, and doing so caused the preview window to drop to 1FPS. You'll observe this in the logs.

The stream and recording stayed smooth despite the preview window having a stroke, but, OBS hard crashed about 30-40 minutes later.

Never had this issue happen before in previous versions/on OpenGL.

Steps to Reproduce

1. Switch to Metal Renderer in Settings -> Advanced
2. Start stream
3. Look at stats, or watch the preview window if you're unlucky enough like I was
4. Observe that the system's CPU usage is perfectly normal.
   ...

Anything else we should know?

No response

Start by reviewing the two OBS log URLs and the Metal Renderer setting under Settings → Advanced, then reproduce the preview slowdown while streaming on macOS. Done means the preview remains responsive after moving the OBS window and OBS does not crash during the reported streaming period.