(Bitcoin Core, recovering my wallet) problem finding the address I sent coins to in Bitcoin Core 0.11.2 Im trying to find my Address I sent my Bitcoins to but I do not know how to get into my wallet and since it is quite some time ago, I do not remember from where I sent it. 

While trying to open Bitcoin Core on my Mac theres a popup saying that its unable to connect to port 8333 but the program closes afterwards. 

Since there is a problem with opening the port I want to transfer the coins to an electrum address. For that I need my seed and the Bitcoin Address I sent my coins to. Is there a way to find it without opening port 8333 and synchronising the blockchain? 

Will it be safe to deinstall it and try to boot it again? 

Any ideas, suggestions are welcome!

Thanks
First you need to backup your wallet.dat file. Then, since your installation is from a while ago, I would recommend reinstalling bitcoin, and then importing your wallet.dat.

Backup wallet.dat

To copy your wallet.dat on a Mac:

Cmd+Space then type terminal

In terminal type:

cp ~/Library/Application Support/Bitcoin/wallet.dat ~/Desktop

I would recommend also backing up a copy to another computer or disk drive.

Install Bitcoin-core

Download and open .dmg file from bitcoin.org, and follow installation instructions.

Restore wallet.dat

To copy your wallet.dat back on a Mac:

Cmd+Space then type terminal

In terminal type:

cp ~/Desktop/wallet.dat ~/Library/Application Support/Bitcoin/

Then you can export your key to whatever wallet you want.