Why is ITerm Open Source? Good Question

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George Nachman @gnachman the creator of the ITerm project describes himself in his twitter bio as “the iTerm2 guy. I eat, sleep, and breathe terminal emulation. It is my everything.”, but what is ITerm exactly? ITerm is a GNU licensed terminal for MacOS, it supports a terminal with new features and even viewing images (for some reason).  but why is it open source? I couldn’t find a exact answer anywhere in the internet, but, I think the reason is the lack of Terminal alternatives on MacOS.

Examining under the GNU License it specifies how the software is made to share, to give you the freedom to do whatever you want, share it and change it, free to all users.

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Looking at some responses in Quora.com, I found that the reasons why the users choose to have this terminal over the standard app, are the COLORS and mouse support,