iOS 15.4.1, iPadOS 15.4.1, macOS 12.3.1 Monterey, and Siblings Fix Bugs and Security Vulnerabilities

[ace (Adam Engst)]

Looks like macOS 12.3.1 also fixes a bug related to two monitors not appearing on a MacBook Pro:

macOS 12.3 seems to not support 2 external monitors on MacBook Pro 2020

This morning, after upgrading to macOS 12.3 on my MacBook Pro 2020, one of my two external monitors no longer displays. It also does not show up in the monitors section of the system preferences. Both of these motors are LG HDR 4K’s and are connected to the laptop via CalDigit USB-C Pro Dock with DVI cables The left monitor was assigned as the primary monitor and It is the one that no longer works. If I unplug the monitor and plug it back in, the display shows a backlight but then says no sig…