Issue with Bitcoin Core 11.8. Cant get into my wallet.

Aug 19, 2018
I am trying to find my private Key in Bitcoin Core 11.2 on my Mac-book to move it to Elect-rum since I have problems with opening the Software properly and I don't want to wait to let it sync.
I have changed some settings in the Program so it opens up every time I start the Mac and there is a popup saying "unable to reach Port 8333". Then it closes again... There is NO option opening the command line for bitcoin core.
Is there another way to find my Private Key? Can I just put my wallet into elect-rum?
Help is appreciated!