Hi EladShtiegmann,
I think there is an external bluetooth device trying to connect to your computer. I was suggesting you turn the bluetooth off as an initial troubleshooting step - that is the reason for the article above. A few more things you can try are to unplug all peripherals and restart the computer in Safe Mode; and to reset the computer's PRAM. Here's how:
Follow these steps to start up into safe mode.
- Start or restart your Mac.
- Immediately after you hear the startup sound, press and hold the Shift key.
- Release the Shift key when you see the Apple logo appear on the screen.
After the Apple logo appears, it might take longer than usual to reach the login screen or your desktop. This is because your Mac performs a directory check of your startup disk as part of safe mode.
To leave safe mode, restart your computer without pressing any keys during startup.
If you don't hear a startup chime after pressing the power key, see what to do if your Mac won't turn on.
If your startup disk is encrypted with FileVault, you can still hold down the Shift key immediately after powering on your Mac to start up in safe mode. You might be prompted to log in twice as part of this process – first to unlock the startup disk, and a second time to log into the Finder. You can let go of the Shift key after you see the first login screen.
If an issue doesn't happen when your Mac is started in safe mode, try restarting again without pressing any keys at startup. If the issue appears to be resolved when you start up normally, it was possibly caused by a cache or a directory issue with your startup disk that safe mode fixed.
If you restart your Mac normally and an issue comes back when you reach your desktop, try disabling any login items that automatically open when you log in.
-
Choose Apple menu > Shut Down.
-
Locate the following keys on the keyboard: Option, Command, P, and R. You will need to hold these keys down simultaneously in step 4.
-
Turn on your Mac.
-
Immediately press and hold the Option-Command-P-R keys. You must press this key combination before the black screen with the Apple logo appears.
Continue holding the keys down until your Mac restarts, and you hear the startup sound for the second time.
-
Release the keys.
Take care,