kyy0x4 wrote:
I tried it on a smooth internet connection, but why is it still laggy? Is it because this Mac is no longer strong enough to share screens or record?
Old issue, new issue, what changed? It would seem some context here would be insightful(?)
Note the current macOS Montery is 12.7.6
I don't believe " because this Mac is no longer strong enough to share screens or record"..
—I would verify you have 15-20% free storage on your hard drive to operate efficiently and not choked.
—Uninstall any VPN you are using to compare your results
—Uninstall all third party apps that are Cleaners/Optimizers/VPN/Anti-Virus
all known to cause issues on the macOS
—unplug all non-essential peripherals when testing
further trouble shoot further you can:
—A SafeBoot Start up your Mac in safe mode - Apple Support will sort many anomalies
Does a quick disk repair before it fully boots up, and certain system caches get cleared and rebuilt, third party system modifications and system accelerations are disabled temporarily.
Login and test. Reboot as normal and test. Caches get rebuilt automatically.
This test will tell you if third party interference; most extensions etc are not loaded in safe boot mode.
—Test issue in another user (or guest user) account Change Users & Groups settings on Mac - Apple Support
This will tell you if it a universal issue or isolated to your user/admin account.
see vintage and obsolete:
https://support.apple.com/en-us/HT201624