iMovie 10.1.16 crashes on launch

Hi, Peter,

There is a conflict somewhere that is causing the crashing. Nothing to do but try some diagnostic procedures to see if you can isolate it. Here are a few easy to do ones that you can try:

Deleting

Preferences

Open iMovie while holding down the Option

and Command keys and select to delete preferences in the box that appears.

iMovie will open in a new library. Reopen your old library to get back to your

projects.

Opening

iMovie in a new library

Try opening iMovie in a new library.  To do that, open iMovie while holding down

the Option key and then selecting to create a new library in the box that

appears.

Opening

iMovie in a new user account

Create a new user account from System

Preferences/Users and Groups and try to open and use iMovie in the new account.

You can use the Guest account on your Mac for this purpose.

Safe

Mode

You could also try booting up in Safe

Mode (see Finder menu for instructions) and, after everything loads,

immediately shut down and reboot in normal mode. Then see if iMovie works

properly.

Updating

iMovie

To update/redownload iMovie 10, drag your

iMovie 10 app from the Applications folder into the trash, but do not empty the

trash. Sign in to the app store and open your purchases folder by

clicking on your name at the bottom of the app store side bar. You will see your purchases

displayed, including iMovie 10. Redownload/update iMovie from there. If not

successful, drag your present iMovie app out of the trash and return it to the Applications folder.

Resetting

the System Management Controller

Try resetting the System Management

Controller:

https://support.apple.com/en-us/HT201295

Resetting the NVRAM or PRAM

Try resetting the NVRAM or PRAM,

although this issue would be fairly rare:

https://support.apple.com/en-us/HT204063

-- Rich