eGPU for FCPX on High Sierra or Mojave?
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eGPU for FCPX on High Sierra or Mojave?  


New Member
Joined: 1 year ago

Hello there, 

I've lost track of the hours I spent reading on this forum, trying to learn and gather all the info before taking the plunge.

I'm looking for an eGPU primarily to improve FCPX playback and render (Export would be a bonus).

Would someone be about to provide some advice if option 1 (High Sierra) or option 2 (Mojave) is better? 


  • Macbook Pro Retina (Mid-2012) 
  • 2.6 GHz Intel Core i7
  • 16 GB Memory 
  • GeForce GT 650M
  • TB1

Option 1 (High Sierra):

  • macOS 10.13.6 (High Sierra) 
  • Use “” script to force FCPX 10.4.6 to use eGPU for all FCPX tasks 

Option 2 (Mojave): 

  • macOS 10.14.6 (Mojave) 
  • Use ‘Prefer External GPU’ option in Finder to force FCPX 10.4.6 to use eGPU for all FCPX tasks 

Required for both scenarios: 

  •’ script to enable eGPUs for Macs with TB1
  •’ script to prevent built-in Nvidia dGPU from interfering (uninstall/install when needed on the go) 

Available option: 

  • Downgrade FCPX from 10.4.6 to 10.3.4, if needed for performance (avoiding 10.4.7 for time being as it shares FCPX tasks between dGPU and eGPU) 

Proposed EGPU Build: 

Please correct me if my understanding isn't right here. I do understand there are limitations to TB1 and there are side effects to ‘’. Thank you again to the community here, its incredible what you guys have achieved breathing new life into older Macs. Any suggestion is greatly appreciated!  

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.