Looking for solution to Error Message: "Unapproved caller. Security Agent may only be invoked by Apple Software." Started when I also noticed merpAD for Microsoft files in my trash.(May be coincidence?) Now, computer won't start at all. Is this a virus? Help!!!
MacBook Pro (13-inch Mid 2012), OS X Yosemite (10.10)
Restart the computer in safe mode. Certain caches maintained by the system will be rebuilt.
Safe mode is much slower to start up than normal. The next normal startup may also be somewhat slow.
When the login screen appears, restart as usual (not in safe mode) and test. There's no need to log in while in safe mode.
Note: If FileVault is enabled in OS X 10.9 or earlier, or if a firmware password is set, or if the startup volume is a software RAID, you can’t start in safe mode. In that case, ask for instructions.
Error Message: "Unapproved caller. Security Agent may only be invoked by Apple Software."
