I’ve been dealing with this issue since the recent Sequoia update, but I finally found a solution and got it fixed. It was pretty annoying, but everything’s fine now. How did i fixed the issue? you can check here. [MacBook Pro Screen Flickering Issues: Causes and Solutions] https://techeasyreview.com/macbook-pro-screen-flickering-fixes/

Hidden system files might be using more space than shown or you might have large files cluttering your Mac. Try this to free up space: Check "Storage" details in "About This Mac." Clean up unused files, Downloads, and media. Optimize storage with built-in macOS tools. Empty Trash securely. Why do you need to experiment with installing a different os at first place?

You're not alone. Here's why it happens and what to do: Cause: System files, caches & incomplete iCloud sync can eat up space. Fix: Restart, offload apps, check iCloud settings, update iOS (if needed). Last Resort: Backup & restore as new (erase all content first!).