These steps will flush a MagicJack installation on a Mac.
This is not for the faint of heart, but hopefully I spelled it out enough to help anyone with a Mac get the installation flushed. After performing, it will be like you are plugging your MJ in for the first time. I just wish MagicJack techs knew this information.
1) Unplug your MagicJack.
Reboot your Mac too if you'd like, but it's not necessary.
2) Open Terminal, Run the following two commands:
3) Delete a Hidden MagicJack Folder (very important)
The above commands allows you to view hidden file/folders, which is necessary for this step. Open the Users Folder, Select your User Account Folder, and delete the ".magicJack" folder. It is a hidden folder with a period (.) in front of the name. Folder location: /users/[USER]/.magicJack
4) In Terminal, Run the following six commands:
5) Empty Trash.
All done. Now plug your MagicJack back in and it will be like you are plugging it in for the first time. It may also be helpful to plug it in directly (without the cable).
Information
The rm commands basically clear other folders that do not have any locking permissions on them. The ShowAllFiles command from step 2 and step 5 both enable/disable the ability to view hidden folders which is necessary for step 3. The killall command restarts the finder which is necessary after running the ShowAllFiles command.