Yosemite - could not load internet accounts preference pane - same for icloud - mail not running
After Up-Grade to Yosemite 10.10:
- Mail not working
- Preferences Error Could not load Internet Accounts preference pane
- Preferences Error Could not load iCloud Accounts preference pane
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Had several issues when upgrading from Mountain Lion to Yosemite 10.10. Finally it seemed to work. When starting Mail, I tried to restore data from Time Machine (did a back-up under Mountain Lion immediately before up-grading to Yosemite). This ran for over 2 h when I suddenly noticed that "Mail quit unexpectedly. Since then I cannot work with Mail at all.
I read on the forum that many people have issues with Mail in Yossemite but apparently it's different from what I am experiencing, and it seems that none of the proposed solutions work for me.
I can start Mail, but I will only see the bar on top of the screen. Mail "Preferences" remains grey (= cannot click).
When choosing Mail "Accounts", System Preferences opens and then I get the "Preferences Error Could not load Internet Accounts preference pane."
I noticed then that I get a similar error when clicking "iCloud" in System Preferences: "Preferences Error Could not load iCloud Accounts preference pane."
I can open "Internet Accounts" and "iCloud" in System Preferences when I log in as a guest without any errors, but as soon as I log in with my user name, I get the same errors.
As suggested elsewhere in this forum, I removed the com.apple.mail-shared.plist in library and tried the same with com.apple.internetaccounts.plist.
I've spent hours on this and find this increasingly frustrating. I would try another new installation of Yosemite, if only I could be confident it would work this time...
Any advice how to solve this will be appreciated!
MacBook Pro, OS X Yosemite (10.10), 15'' Mid 2010, 2.4 GHz i5, 8GB RAM