Hi there! I’m sorry to hear that VITA is freezing when you try to move or edit clips—let’s get this sorted out together. To make sure I understand fully: does the app freeze immediately when you start moving or editing, or after some time into the editing? Also, are you working with large video files or many clips at once?

Meanwhile, here are some steps to try that often help with freezing in editing apps on a Macintosh running OS X 10.15.7:

1. Restart the VITA app and your Mac: Sometimes a fresh start clears any temporary glitches.

2. Close other apps: Since your device might get overwhelmed if many apps are open, try running VITA alone to free up system resources.

3. Check for app updates: Make sure you are using the latest VITA app version, as updates often fix stability issues.

4. Clear VITA app cache or temporary files: Look into the app’s settings or preferences for a clear cache option, or try uninstalling and reinstalling the app to clear corrupted temporary data.

5. Reduce clip sizes or edit fewer clips at a time: If you are working with very large or multiple clips simultaneously, try smaller batches.

6. Check your Mac’s storage and memory: Ensure you have enough free disk space and RAM availability, as low resources can cause freezing during video editing.

If after these tries the problem persists, it would help to know if this happens with all projects or just specific clips. Also, do you have any special plugins or external drives connected while editing?

Let me know what you observe from these steps, and we can dig deeper or explore other solutions! Are you able to try these and share how it goes?