Hi
iMovie and iPhoto - uses libraries. One can select in iPhoto to use another one (Library) and then iMovie can not see photos in the old one - they are in sort of relation to each others.
• In iPhoto - select to use the other (old) Library
• Close iPhoto
• Now first let iMovie start up
• and let it create all thumbnail photos
And now You see the ones in the old iPhoto Library
Yes this is confusing
Else
iPhoto - Library got corrupted (not so rare situation)
Medicine - YOU NEED - lot's of time (several hours - can not be Paused safely), Computer running on Power/Mains - not only battery !
• Close all programs
• Start iPhoto - BUT NOW KEEP [ alt + cmd ] keys down during up-start
• Select all options
• Do something else for a long long time
• When done - Close iPhoto
• Open iMovie
• and let it create all thumbnail photos
Yours Bengt W