How to Completely Uninstall Xcode and Clear All Settings

For complete removal old Xcode 7 you should remove

1. /Applications/Xcode.app
2. /Library/Preferences/com.apple.dt.Xcode.plist
3. ~/Library/Preferences/com.apple.dt.Xcode.plist
4. ~/Library/Caches/com.apple.dt.Xcode
5. ~/Library/Application Support/Xcode
6. ~/Library/Developer/Xcode
7. ~/Library/Developer/CoreSimulator

For a complete removal of Xcode 10 delete the following:

1. /Applications/Xcode.app
2. ~/Library/Caches/com.apple.dt.Xcode
3. ~/Library/Developer
4. ~/Library/MobileDevice
5. ~/Library/Preferences/com.apple.dt.Xcode.plist
6. /Library/Preferences/com.apple.dt.Xcode.plist
7. /System/Library/Receipts/com.apple.pkg.XcodeExtensionSupport.bom
8. /System/Library/Receipts/com.apple.pkg.XcodeExtensionSupport.plist
9. /System/Library/Receipts/com.apple.pkg.XcodeSystemResources.bom
10. /System/Library/Receipts/com.apple.pkg.XcodeSystemResources.plist
11. /private/var/db/receipts/com.apple.pkg.Xcode.bom

But instead of 11, open up /private/var/in the Finder and search for "Xcode" to see all the 'dna' left behind... and selectively clean that out too. I would post the pathnames but they will include randomized folder names which will not be the same from my Mac to yours.

but if you don't want to lose all of your customizations, consider saving these files or folders before deleting anything:

1. ~/Library/Developer/Xcode/UserData/CodeSnippets
2. ~/Library/Developer/Xcode/UserData/FontAndColorThemes
3. ~/Library/Developer/Xcode/UserData/KeyBindings
4. ~/Library/Developer/Xcode/Templates
5. ~/Library/Preferences/com.apple.dt.Xcode.plist
6. ~/Library/MobileDevice/Provisioning Profiles

1. Open Storage Management

   • Go to  > About This Mac > Window > Storage Management
   • Or, hit ⌘ + Space to open Spotlight and search for Storage Management.

2. Select Applications on left pane.

3. Right click on Xcode on the right pane and select delete.

This will remove XCode from the installed applications list of your Mac's App Store.

Update: This worked for me on macOS Sierra 10.12.1.