Windows won't open from Mac Dock
These might help. Not known for sure.

Method 1 :


Go to ~/Library/Preferences.
Take a backup of the com.googlecode.iterm2.plist file.
Delete it from Preferences folder.
Restart iTerm.
Maybe it gets fixed. Else put back the backup file in the same folder.


Note: You may not need backup if you wish you may not need the user settings.

Method 2 :


Close the windows.
Right click and unselect Options -> Keep in Dock.
Restart iTerm from Applications folder.
Select Options -> Keep in Dock.


My References : Mail not opening issue in Apple Discussions, Details regarding .plist files, Similar issue in SuperUser