Can not open Aperture

Question

When I click Aperture icon it become active (light is on) however, it will not open.  How can I get Aperture to open up my library so I can work with my photos.

Answer 1

The toolbar for Aperture is available and nothing is grayed out.
Can you please post a screen shot of what your Aperture window looks like?
(Press Shift-Command(⌘)-3, the screenshot will appear on your Desktop; to add the screen shot to your post press the camer icon)
Since the problem only occurs in your admin account, try to reset the preferences and user settings: . This will not impact your image files or your library.
(from Aperture 3 Trouble Shooting Basics  http://support.apple.com/kb/HT3805 )
To reset your Aperture user preference settings to their original state, do the following:
Quit Aperture.
In the Finder choose Go to folder from the Go menu.
Type~/Library/Preferences in the "Go to the folder" field. Press the Go button.
Remove the "com.apple.Aperture.plist" file from the Preferences folder.
Defer preview generation
If Aperture does not open, it may help to defer creation of previews. Press the Shift key immediately after you start Aperture to prevent preview generation for that session. If a damaged image in your library is preventing normal opening, this may allow you to start Aperture.
Move the user created presets, keyword lists, and so on...
Quit Aperture.
In the Finder choose Go to folder from the Go menu.
Type~/Library/Application Support/Aperture in the "Go to the folder" field. Press the Go button.
Move the contents of this folder to your Desktop
Start Aperture and see if the issue is resolved. Note: Permanently removing these files will delete presets, metadata sets, keyword sets, and so on. If moving these files to the Desktop does not resolve the issue, move them back to their original location to restore the presets, adjustment chain presets, and metadata sets. In no case will removing these files affect metadata, keywords, or adjustments already applied to images.