Hi,

Today I upgraded from MAMP PRO 2.x to 3.x.
This made CKEditor not showing anymore.
Probably because PHP version switched suddenly from 5.3.x to 5.5.x.
Anyway, here's what I tried in order to make it reappear:
- clear caches
- run cron
- run updates
- update CKEditor's library from 4.1.x to 4.3.x
None of it changed.
Then I tried something else which did work: go to CKEditor's config at admin/config/content/ckeditor modifiy the Profile for which the editor does not show (in my case Full HTML), don't change anything, just scroll down the bottom of the page and click save.That's it! It should now show up. At least it did for me! Hope this'll help somebody some day.

++
Nick