Is there more information about this new setting and what it does for me?

gregfreeman1 Said:

"Is there more information about this new setting and what it does for me?"

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Learn About this here: About Rapid Security Responses for iOS, iPadOS, and macOS - Apple Support. Being a bit new, I plan to wait a few days, seeing if any bugs come about in the next few days. I have come about nothing as of yet.

Important: Back Up your Mac First:

Be certain you create a backup of your Mac prior to performing an update. That way, you will have something to restore your Mac from, should anything go wrong with after the installation. For the Backup, use an external hard drive of at least 1.5 times the storage.

Rapid security responses are patches issued to close security holes that are actively being exploited.

Download them immediately or don’t and allow hackers to steal your information.

it is up to you.