Imovie

Try upgrading or doing a fresh install of your OS, plus an updating of your iMovie app. That worked for one recent poster, who upgraded to Mojave and the updated to iMovie 10.1.14. Try just updating iMovie first.

— Rich

Hi, marise241,

The Compressor Kit Error message has been reported with increasing frequency

of late. No universal fix so far. The fix that has worked the most has been

starting up in Safe Mode (see Finder menu for instructions) and then after everything

loads immediately shutting down and rebooting in normal mode.

Here's a link, though older, that pretty much describes where we are today

with the Compressor Kit Error:

https://discussions.apple.com/thread/8265338

There may be some proposed solutions in the above link that will work for

you.

All else failing, try calling Apple Support. The techs there are very savvy

and also have the capability of remotely accessing your computer. Click on the

Contact Support item in the upper right hand corner of this screen and navigate

to a box that will ask for your telephone number so that Apple Support can call

you back. I think that the file path is Contact Support/Mac OS/Applications/iMovie,

or somthing like that. Good luck with this. If you have time, post back with your results, as it

may assist others who have this perplexing issue.

-- Rich