On September 13, 2021 Apple announced that many of its operating systems contain a vulnerability that could allow an attacker to run software on your device. Apple has fixed the vulnerability, and to protect your devices you must update each of them to the latest available software.
How to Resolve
In order to protect your iPhone, iPad, and Mac, you must update its software. However, the specific steps will vary depending on your operating system version. Here’s how you can identify your version of macOS.
If Your Mac is running Catalina, follow the steps below
If your Mac is running Big Sur, read our other blog article for updating Big Sur.
Step 1
Click the Apple logo in the top left corner of the Menu Bar and select “System Preferences”.
Step 2
Select “Software Update”.
Step 3
Select “More Info” underneath the text that says “Another Update is Available”.
Step 4
A window will appear with the macOS Catalina 10.15.7 update, click “Install Now”. You may install other updates if they appear as well.
Step 5
A window will appear that says you must restart your computer, click “Restart”. Once your Mac restarts, you will see another progress bar as the update is installed. This process may take 30 minutes to complete.
The computer will restart and the download and install will commence. Once completed, your device will restart back to the login screen. This means the install has completed and the security patch has been applied.