Setting up 1-click plugin updates in a dev environment

Hey Guys,

I'm running a dev environment for my WP site and I'd like to get 1-click plugin updates working so I have a nice frictionless workflow to test new plugin updates before I update them in the live environment.

My dev environment is on OSX and I'm using the built in apache server.

Is there a better, cleaner more secure way to setup these updates without using FTP? It seems to me that there is because 1-click updates work fine on my live site (hosted by JustHost) yet I didn't enter any FTP credentials into WP to activate it. In fact I didn't have to do anything to activate it.

Cheers,
Craig