Did it get to a login screen?
Is your mouse a USB mouse?
Is it plugged in to the computer or is it wireless?
1. Shut down the computer by holding power button again for 10 seconds.
2. Unplug the computer's power cord.
3. Wait fifteen seconds.
4. Attach the computer's power cord.
5. Wait five seconds, then press the power button to turn on the computer.
6. Press and hold the Command-Option-P-R keys before the gray screen appears.
7. Hold the keys down until the computer restarts.
8. Release the keys.
The letter P and the letter R, 4 keys- Command-Option-P-R
OK take your time
Try again but since you are there:
Select the Disk Utility and then select Continue. Then in Disk Utility select Macintosh HD in the left column (if there are two with that name or it is named something else choose the first indented item) and then select Verify Disk on the right. If that says “OK” in green type then select Repair Disk Permissions. If it is not ok let me know.
Do you have a USB mouse we can use?
OK you will need to use a USB mouse go to System Preferences / Bluetooth and delete the wireless mouse then turn the mouse off and on and pair it again
Right you need to borrow a USB mouse
Yes most people have a USB mouse around, obviously I can't work miracles without the tools we need, LOL . There is one last thing we can try. If you can open the Terminal in Applications / Utilities type each line below exactly hitting Return after each then restrt:
sudo kextunload -b com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport
sudo kextload -b com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport
Yes you can which is why I asked you hit Command space to open Spotlight then type Terminal then use arrow keys to go to Terminal then Return to open it... this all just using the keyboard
By remote I can use my mouse but it may be hard to get it going
Open Spotlight to start a search
Command (⌘)-Space bar
Command then Spacebar to see the Spotlight window
Is it a wired keyboard?
Then this has never been working, great...
Do you have a USB keyboard?
OK we need at least one of those to make this work, I assumed you had a wired keyboard because you never mentioned it was also wireless.
Yes I understand that now thanks..
Not if you can't control the computer at all sorry
OK good luck
Did you get that sorted out?