Editor stuck on Generating Lightmap

When I am creating Lightmaps for my scene, the editor often gets stuck at the following screen


It keeps showing me, that it is at 29% and the remaining time just goes up.
I have to manually shut down the editor and relaunch it in order to work on the project again.

My editor log show me the following messages:

Request Asset Garbage Collect because used heap size increased from 5.02 GB to 6.54 GB, exceeding the threshold of 1.25 GB.
Unloading 2 Unused Serialized files (Serialized files now loaded: 0)
Unloading 2 unused Assets / (Unknown). Loaded Objects now: 12117.
Memory consumption went from 7.08 GB to 8.31 GB.
Total: 70.090666 ms (FindLiveObjects: 1.447583 ms CreateObjectMapping: 0.446625 ms MarkObjects: 68.008792 ms  DeleteObjects: 0.186958 ms)

Request Asset Garbage Collect because used heap size increased from 8.09 GB to 11.47 GB, exceeding the threshold of 2.02 GB.
Unloading 2 Unused Serialized files (Serialized files now loaded: 0)
Unloading 2 unused Assets / (1.7 KB). Loaded Objects now: 12117.
Memory consumption went from 11.47 GB to 11.47 GB.
Total: 69.232625 ms (FindLiveObjects: 0.465417 ms CreateObjectMapping: 0.178583 ms MarkObjects: 68.537500 ms  DeleteObjects: 0.050375 ms)

Request Asset Garbage Collect because used heap size increased from 11.46 GB to 15.14 GB, exceeding the threshold of 2.87 GB.
Unloading 0 Unused Serialized files (Serialized files now loaded: 0)
Unloading 2 unused Assets / (1.7 KB). Loaded Objects now: 12117.
Memory consumption went from 15.14 GB to 15.14 GB.
Total: 67.996625 ms (FindLiveObjects: 0.467250 ms CreateObjectMapping: 0.187875 ms MarkObjects: 67.291708 ms  DeleteObjects: 0.049417 ms)

I am running Unity 6 6000.0.23f1 (Silicon Version) on a Macbook Pro with M2 Max Processor and the latest MacOS Sequoia.
My Lighting settings are the following:

This sounds very similar to the problem reported over here. A fix for that problem landed in 6000.0.25f1. I Since you are on 23f1 I suspect this issue goes away if/when you update. Can you try that, please? :slight_smile: