It is EXTREMELY easy to happily share files between your linux system and your mac. I use both Ubuntu and Mac OS X. Simply login into you mac desktop, open up your system settings and turn on Remote Login. This enables incoming SSH connections to your mac. If you want to connect while you are away from home, you can set up some sort of dynamic IP service like DynDNS.org. Open up port 22 on your home firewall or router and you can connect to your home mac from anywhere you go with an internet connection.

Once your mac has SSH enabled, log into your Ubuntu machine and click Places –> Connect To Server. Choose SSH as your Service Type. Enter in the IP address of your mac or whatever name you may have assigned to it in your /etc/hosts file or whatever. Use the username and password you use to log into mac and there you go. You can browse files on your mac with your Ubuntu machine in Nautilus.