Second: Close Bitsend client app (I assume you're using the Bitsend QT client version 0.14.0.4)
Third: Go to ~/Library/Application Support/Bitsend/ (that's where your wallet.dat file is stored) and find a file named "peers.dat". Rename it to "peers.old" and restart the client.
If you're comfortable with compiling your own wallet, better download the latest source at https://github.com/LIMXTEC/BitSend/archive/v0.14.0.5.tar.gz , extract it and compile (see doc/build.osx file in the source)
Good luck.