Hi! I understand you're having trouble with the Magic Eraser app on your Mac being blocked from accessing photos, even though your location services are enabled. I'm here to help you figure this out.

First, can you confirm if you've checked the app’s specific permission to access your Photos library on your Mac? Having location services on doesn’t automatically grant the app access to your photos. On macOS Catalina (10.15.7 is Catalina), apps needing photo access require explicit permission through the System Preferences.

Here’s a step-by-step guide to check and update the permissions:

1. Click the Apple menu () on the top-left of your screen, then select "System Preferences."

2. Choose "Security & Privacy," then go to the "Privacy" tab.

3. In the left sidebar, select "Photos."

4. Locate the Magic Eraser app in the list on the right and ensure the checkbox next to it is ticked. If it’s unchecked, the app can't access your photos.

If the Magic Eraser app is not listed, the app likely hasn't requested access yet or there's a permissions glitch.

Additional step if you don’t see the app listed or permissions remain blocked:

5. Go to "Files and Folders" (still under Privacy) and ensure Magic Eraser has permission if it shows up there.

6. If permissions look correct, try restarting your Mac after toggling these settings.

7. Also, consider reinstalling the Magic Eraser app. Deleting it and then reinstalling can sometimes reset permissions prompts.

A quick note: Location Services mainly affect location-based features; they don’t govern photo library access. That access is a separate privacy permission.

Could you please check these settings and let me know what you find? If the app has access but you still face issues, we can look deeper into other settings or potential conflicts.

Are you ready to try these steps?