Connecting to Ubuntu with a Mac is relatively easy. The following uses SMB (Windows File Sharing) to share files between Linux Mint/Ubuntu and OSX. This is the easiest way I have found to share files and create a permanent share.
First, create the share on Ubuntu
cd ~ mkdir Shared sudo chown nobody.nogroup ./Shared sudo chmod 777 ./Shared
Then, install smb.
sudo apt-get install smb
1. vim /etc/samba/smb.conf
2. Modify the following:
workgroup = EXAMPLE is located in the [global] section. Further down in the [global] section is the security. You can name the workgroup whatever you wish.workgroup = EXAMPLE security = user
Create the share at the bottom of the file.
Replace /path/to/Shared/folder with the full path to the Shared folder you created at the beginning.[share] comment = Ubuntu File Server Share path = /path/to/Shared/folder browsable = yes guest ok = yes read only = no create mask = 0755
You can name [share] whatever you want, like [sharedfolder].
Add your user.
sudo smbpasswd -a usernameWhere username is your Linux Mint login name. It will prompt you to enter a share password. Use a different password than your Linux Mint password.
sudo restart smbd sudo restart nmbd
Access from OSXOpen Finder then type in Cmd-K.
Type in smb://x.x.x.x where x.x.x.x is the IP of your Ubuntu machine (use ifconfig on Ubuntu to find this).
Use your Linux Mint username and the password set above with smbpasswd (not your login password) to connect.
The folder should appear on the left on finder.
Now you can share files between your Mac Mini OSX and Linux Mint machines. Happy coding.