Can't sync Aperture to iPad2 through iTunes
I just bought Aperture (3.3.2), 'up-grading' from iPhoto.
I previously, of course, sync-ed my photos to iPad 2 through iPhoto.
Thought I'd now sync through Aperture.
However, when in iTunes I go to (sync) Photos > iPhoto and change it to Aperture, up comes a warning:
"Your Aperture Library could not be found. Open the
preferences window in Aperture and enable the preference
to share previews with other applications."
I've looked in Aperture preferences a hundred times and can't for the life of me find anything mentioning 'share previews with other applications'.
There's the one 'share previews with iLife and iWork' and that's set to 'always', but nothing else.
I saw some discussion here about deleting the iPod Photo Cache and I've done that, but still the same warning when switching from iPhoto to Aperture in iTunes.
Any other bright ideas?
Thanks.
iMac, OS X Mountain Lion, It's lovely.