I ran repair permissions and repair data base, but could not find the file -/Library/Preferences - "folder not found" I changed it slightly to /library/Preferences which brought me somewhere, but I still could not find the file com.apple.Aperture.plist
There are no com.apple.Aperture files in the list at all.
Kirby's advice should work, if you open the correct library: You are looking at the system library /Library/Preferences, not at your user library.
In Mac OS X Lion your User Library is hidden by default.
You can access it by using the Finder's "Go" menu from the Finder's main menu bar.
- Select the "Go" menu entry and hold down the "alt/option" key ⌥, until the library appears in the drop down menu.
- Select and click "Library".
- In the window that opens select the "Preferences" folder, and then move the file "com.apple.Aperture.plist" to the Desktop, like Kirby suggested.
Make sure, you quit Aperture properly, before you move the preference file. Im Mac OS X Lion new process system (automatic termination) the only safe way to ensure that an application really quits is to log off and on again.
Then it should work, like Kirby Krieger suggested. And please let us know, if this brought back your clone brushes.
P.S. If you want to make your user library permanently accessible again, drag the folder to the Finder's sidebar or change the hidden flag to "nohidden" using the Terminal:
Open a terminal window and enter:
chflags nohidden ~/Library
Then hit return.