Unreal 5.1 Performance on iMac

Hello,

I’ve have encountered several issues while running UE 5.1 on my machine.

My specs are:

Model Name: iMac Pro
Model Identifier: iMacPro1,1
Processor Name: 10-Core Intel Xeon W
Processor Speed: 3 GHz
Number of Processors: 1
Total Number of Cores: 10
L2 Cache (per Core): 1 MB
L3 Cache: 13.8 MB
Hyper-Threading Technology: Enabled
Memory: 64 GB

The issues I’ve encountered are:

  • Takes a long time to “Compile Shaders” on UE5 boot. Around 20+ minutes.
  • Generally slow performance. System lags / internet browser becomes unresponsive.
  • High fan speeds while using UE5 - machine seems to be working overtime.

I’ve read through a few threads trying to resolve this issue but can’t find anything specific to iMac. Any pointers would be greatly appreciated. Many thanks.

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