I am not able to make a new project in this I movie version 10.1.15.

Hi, niranarch,

iMovie freezing and not being able to create a project might be a glitch related to the new update, or maybe just a little tinkering is needed. Try the diagnostic procedures below and see if any of them resolve the issue.

Deleting Preferences

Try opening iMovie while holding down the Option and Command keys and selecting 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.

Open iMovie in a new user account

Create a new user account from System Preferences/Users and Groups and try to open and use iMovie there.

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.

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.

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

Great! Glad you got it working.

Deleting preferences is easy to do and should be the first tool to try when iMovie is not functioning correctly.

-- Rich