Terminal

Terminal.app comes pre-installed and you’ll find it in Applications > Utilities.

Enter the “open” command and add the “-a Mailplane” option to open files in Mailplane. It composes a new message and attaches one or more files.

open -a Mailplane file1 [file 2] [...]

Example: open -a Mailplane mypicture.jpg anotherfile.doc

Tip: You can create a custom ‘mailplane’ command for easier use:

1. Open your shell login script in your favorite editor (for example ~/.bash_login)
2. Enter alias mailplane='open -a Mailplane'
3. Open a new Terminal window and try mailplane thefile.jpeg