Hi! I’m Alice Johnson, here to help you sort out the problem with your Measure app. Could you please tell me a bit more about what exactly isn’t working? For example, is the app not opening at all, are you seeing a black screen, or is it not measuring correctly?

Knowing this will help me guide you better! Meanwhile, I’ll share some general steps we can try to get started:

1. Restart your Mac. Sometimes a simple reboot helps clear out any temporary glitches.
2. Make sure your macOS 10.15.7 is fully updated. Although Measure is typically an iPhone app, if you are using any related software on your Mac, keeping the OS up to date is key.
3. Check any permissions you might need to enable for camera or sensor access if your Measure tool uses the camera.

If you can clarify the issue with the app on your Mac, I can provide step-by-step help tailored for your setup!