How to Check MacBooks for Hacks

Turn on the MacBook.
Click on 'System Preferences' in the Apple menu. Once the window opens, click on 'Accounts,' then click on 'Login' Items.
Use the '- sign' to remove items that you do not recognize from the list.
Note the applications you were using when the problem first occurred and review any software that was recently installed.
Check your network activity in your Activity Monitor by locating this file in your Applications/Utilities folder. It will display a list of the processes, statistics, applications, and programs that are currently being used by the computer.
Note any consistent action in the Activity Monitor. If you see purposeful activity, then it is likely that an unauthorized user has connected to your computer using remote access.
Click on the 'System Preferences' window in the Apple menu and launch the System Preferences application. Open the Sharing reference window.
If Screen Sharing is enabled for the computer, note users who are currently allowed access to the computer. If you see suspicious activity, disable the Screen Sharing application.
Disconnect from the network, unplug the Internet cable and turn off the computer.
If problems persist, consult a computer technician.
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