IMac unresponsive

Question

For starters, this concerns an i7 2TB 4GB RAM 27 inch iMac:
After loading over 10000 photos into iPhoto, the computer quit responding to wireless keyboard and magic mouse commands. After a hard reboot, the screen displays everything normally. It shows mouse movement normally yet there is no response when clicking on any pixels, including its inability to retrieve the hidden dock at the bottom of the screen. I never really looked at the bluetooth symbol before, but it is grayed with 3 black dots across it.
I just cannot tell if this is a RAM issue, Bluetooth issue, or something worse. After doing 15 hrs of video editing in FCP I hope to God this is not a drive failure of sorts.
At one point, I put my Tech Tools Deluxe disc in the DVD drive and rebooted holding down the C key with no new result as the same scenario recurred.

Answer 1

HI,
*"It shows mouse movement normally yet there is no response when clicking on any pixels, including its inability to retrieve the hidden dock at the bottom of the screen."*
*"I never really looked at the bluetooth symbol before, but it is grayed with 3 black dots across it."*
The 3 black dots mean your iMac is communicating with your computer, read here. Make sure the mouse is turned on.
Bluetooth: About Bluetooth Icons
Try re-pairing your Bluetooth mouse with your iMac. Open System Preferences/Bluetooth. Delete the mouse from the Devices window. Now click: Set Up New Device and re-pair the mouse with the iMac. Restart your iMac and see if that makes a difference.
Also, the Bluetooth preference files could be corrupted.
Go to /Library/Preferences and move the com.apple.Bluetooth.plist file to the Trash and see if that helps.
Make sure the batteries in the mouse are charged. Open System Preferences/Mouse
Battery level is displayed bottom left corner in that window.
Carolyn