I downloaded 6.3.4 of the Cisco Network Assistant to configure this router, but it wouldn’t launch. I greeted with the error message “The application cna_mac_k9_6_34_en can’t be opened”.

To fix this, open Terminal.app and paste in the following string and then drag and drop the CNA app on top of the Terminal window:

chmod +x

In the my case, it looked like this:

chmod +x /Users/brad/Documents/Brad/Service\ Manuals/Cisco/WS-C2960S-24TS-S/firmware/cna_mac_k9_6_34_en.app/Contents/MacOS/*

After doing this, I was able to launch Cisco’s app!