Which Keys to Use to Copy and Paste Inside Centos Guest on Mac

For that to work you need to install the vbox Linux guest support if you want to use it in desktop mode. And if your not using centos as a desktop and in CLI mode I would say connect to the guest using the terminal app using ssh. The terminal app lets you copy and paste the normal Mac way with cmd+c and cmd+v.

ssh user@ipaddress

Try

control + shift + c

for copy and for paste try

control + shift + v

You need to make sure to set Shared Clipboard to Bidirectional as stated in

From Mac, you can CMD-C and in the terminal of CentOS you can middle button paste. I haven't figured out the other direction yet.

Have you tried Control+C for Copy and Control+V for Paste (instead of Mac's Command button?)