Q: Apple Mail: missing plug-in

Download and install the 10.8.3 combo update. Re-installing that may fix the problem.

http://support.apple.com/kb/DL1640

Please follow these directions to delete the Mail "sandbox" folder.

Back up all data.

Quit Mail.

Triple-click the line below to select it:

~/Library/Containers/com.apple.mail

Right-click or control-click the highlighted line and select

Services ▹ Reveal

from the contextual menu. A Finder window should open with a folder named "com.apple.mail" selected. If it does, move the selected folder — not just its contents — to the Desktop. Leave the Finder window open for now.

Relaunch Mail and test. If the problem is resolved, you'll have to recreate some of your Mail settings. You can then delete the folder you moved and close the Finder window. If you still have the problem, quit Mail again and put the folder back where it was, overwriting the one that may have been created in its place. Post your results.

Caution: If you change any of the contents of the sandbox, but leave the folder itself in place, Mail may crash or not launch at all. Deleting the whole sandbox will cause it to be rebuilt automatically.

Try setting up another admin user account to see if the same problem continues. If Back-to-My Mac is selected in System Preferences, the Guest account will not work. You'll need to add your Mail accounts. The intent is to see if it is specific to one account or a system wide problem. This account can be deleted later.

Isolating an issue by using another user account

If the problem is still there, try booting into the Safe Mode.  Shut down the computer and then power it back up. Immediately after hearing the startup chime, hold down the shift key and continue to hold it until the gray Apple icon and a progress bar appear. The boot up is significantly slower than normal. This will reset some caches, forces a directory check, and disables all startup and login items, among other things. If the system operates normally, there may be 3rd party applications which are causing a problem. Try deleting/disabling the third party applications after a restart. For each disable/delete, you will need to restart if you don't do them all at once.

Safe Mode

Safe Mode - About

General information.

Isolating issues in Mac OS X

Troubleshooting Permission Issues

Step by Step to Fix Your Mac

Upgrade Nightmares

Do you get the error with all images, or only some?

Back up all data.

Boot into Recovery by holding down the key combination command-R at the startup chime. Release the keys when you see a gray screen with a spinning dial.

Note: You need an always-on Ethernet or Wi-Fi connection to the Internet to use Recovery. It won’t work with USB or PPPoE modems, or with proxy servers, or with networks that require a certificate for authentication.

When the OS X Utilities screen appears, follow the prompts to reinstall the OS. You don't need to erase the boot volume, and you won't need your backup unless something goes wrong. If your Mac was upgraded from an older version of OS X, you’ll need the Apple ID and password you used to upgrade, so make a note of those before you begin.

frankd783 wrote:

 

Apple, your quality is deteriorating massively.

 

Frank

You have serious issues here. Most have none. Have you tried repairing your disk from the Command+R boot using DiskUtility? Have you checked the Smart Status of your drive? Sounds like hardware problems. Backup immediately and then do a complete erase and reinstall.

Pete

frankd783 wrote:

 

Yes, yes, and yes.

 

4 drives defetive all of a sudden? Very unlikely!

 

 

You have never mentioned 4 Drives until now. I have five Macs, no issues.Installer ran perfectly on them all.

Pete