Enable Safari Extension in Xcode | Generated by AI
When you run the app from Xcode, it registers the extension with Safari. Here’s what to do:
Enable in Safari
Safari → Settings (Cmd+,) → Extensions tab
You’ll see “TabsKiller” in the list. Check the box to enable it.
![Safari Extensions settings showing TabsKiller checkbox]
After enabling, you’ll see the TabsKiller icon appear in the Safari toolbar — click it to open the popup and configure max tabs / whitelist.
If it doesn’t show up
First time: Xcode runs the app once, which registers the extension. You might need to quit and reopen Safari for it to appear in the list.
Developer mode: Safari → Settings → Advanced → check “Show Develop menu in menu bar”. Then Develop → Web Extensions — you can see and reload the extension there.
App already built: The app lives in Xcode’s DerivedData. You can also copy it:
open /Users/lzwjava/Library/Developer/Xcode/DerivedData/TabsKiller-*/Build/Products/Debug/TabsKiller.app
Run it from there, then enable in Safari settings.
Alternatively, if you want to see it working right now without Xcode re-launching it every time:
# Build once
cd /Users/lzwjava/projects/projects/TabsKiller
xcodebuild -project TabsKiller.xcodeproj -scheme TabsKiller -destination 'platform=macOS' build
# Find and open the built app
open "$(xcodebuild -project TabsKiller.xcodeproj -scheme TabsKiller -showBuildSettings 2>/dev/null | grep BUILT_PRODUCTS_DIR | awk '{print $NF}')/TabsKiller.app"
That will launch the app, it runs in the menu bar briefly, registers the extension, then Safari picks it up.
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