Why is iMovie export to using so little

There are a couple of old standby procedures that you can try.

The first is to delete preferences by opening iMovie while holding down the Option and Command keys, and deleting preferences from the box that appears. iMovie will open in a new library. Reopen your old library to get back to your projects.

Now see if you can share out at a faster rate.

Secondly, sometimes some projects inexplicably act differently than others. You might try doing an Edit/Select All, Edit/Copy, of the media in your project and then Edit/Paste it into a newly created project. See if your export time is reduced.

Two things that can increase export times are exporting in Best Quality (pro res) that will give you a .mov file that is 4x larger; and exporting simultaneously to Theater. High frame rates also increase export time.

-- Rich

Hi, Alan,

I don't know the answer to your question. You might want to read the following Apple article on eGPU set up on a Mac, to see if anything in there raises an eyebrow about your set up:

https://support.apple.com/en-us/HT208544

Possibly it is just a matter of plugging into a different port or configuring iMovie to prefer an eGPU.

-- Rich