Can someone hack into my MacBook Pro even it's not connected to the internet and both Wi-fi and Bluetooth services are off?

Jose Alessandro wrote:

Need to know if someone can hack into my MacBook Pro even if it's not connected to the internet and both Wi-fi and Bluetooth services are off? Can someone enter my system even if the settings at System Preferences > Sharing are all off?

Yes,

Through Bonjour, Apple's open source zero configuration networking.

https://developer.apple.com/bonjour/

http://flylib.com/books/en/2.434.1.105/1/

And you can't turn it off or your computer won't work, however saving grace is the hacker has to be pretty close to your machine to do it.

No

If you have turned off Wi-Fi and Bluetooth and the MBP is not connected via ethernet cable, there is no way for someone to access your computer. This is regardless of the System Preferences>Sharing setting. If they do not have a connection, they cannot access your computer.

As long as you don't plug anything in, since a known corporate hacking technique (for PCs at least) was to leave infested USB sticks lying on the floor in public areas and wait for curious employees to pick them up and plug them into their computers.

However, if somebody gets physical possession of your MacBook Pro, there are many more angles of attack available.

Yes. Walk out of the room or building and they can use your keyboard to gain access.