I installed an app that stores a persistent identifier in the iOS keychain, even after uninstalling and reinstalling it. This really bugs me. Is there a way to delete said app's data from the Keychain, or worst-case resetting the entire iOS Keychain, without resetting the device completely?
Note: I'm not talking about the iCloud Keychain, but the on-device keychain that apps can store small bits of data in.
Best Answer
Have you tried this link? I'm pretty sure this is the answer you're looking for, this link tells you to;
https://answers.uillinois.edu/68546
If you're looking to get rid of sandbox,
https://macuninstallguides.com/remove-sandbox-on-mac.html
If you want to reset the entire keychain, I recommend that you take a look at the answer on this page.
How do I delete or fix my Keychain after changing my password?