MacOS – Disable alt-tab (option-tab) instead of command-tab

@mankoff got me on the right path. Here's what I had to do in order to get what I want:

1. Copy Terminal.app to a new file (ex: MyTerminal.app)
2. Change the icon of the app by:
   1. Copy an icon image to the clipboard from Preview
   2. Right-click (Command-click) on the app
   3. Select "Get Info"
   4. Click the app icon in the upper left corner
   5. Pasting the new icon image from the clipboard
3. Right-click on the App and choose "Show Package Contents"
4. Change the following values in Contents/Info.plist:
   1. "Bundle display name" -> "MyTerminal"
   2. "Bundle identifier" -> a unique app-specific string. I chose "ca.softcraft.myterminal" as I own the domain "softcraft.ca"
   3. Bundle name -> "MyTerminal"
   4. Document Types -> Delete
   5. URL Types -> Delete
   6. Application has localized display name -> uncheck
   7. Exported Type UTIs -> Delete
5. I deleted a bunch of the localization settings (Contents/Resources/*.lproj) as they're not necessary for me; I just need English
6. In Contents/Resources/English/InfoPlist.strings, I deleted the "CFBundleName" and "CFBundleDisplayName" override settings
7. In Contents/Resources/Initial Settings, I deleted all but one of the *.terminal files.
   1. I'm using a custom terminal setting, but there's no reason you couldn't use Basic
   2. In Contents/Resources/Initial Settings/settings.plist, I made sure my "Default Settings" value was set to the name of my .terminal file
8. I set the values in the .terminal file to match what I wanted on open
   1. This is just a .plist file with a different extension; you can use Property List Editor to modify it
   2. You can also set these using Terminal itself and then export them
   3. I mainly changed "CommandString" to be what I want launched when I run the new "app".

This works excellently. The new "Terminal" apps are independent of each other and of the main Terminal. I can spin off new ones fairly quickly now.

I also did this with Firefox to create a site-specific browser for my development website. (I had tried Mozilla Prism but found it too limiting).

Option+Tab shouldn't be assigned to switching windows by default. You could've reassigned it in the Keyboard preferences:

It could also be handled by some third party app like Witch, LiteSwitch X, or Keyboard Maestro on the MacBook Pro.