According to posts on Apple’s support page, after the latest macOS Monterey 12.3 official version update, some users reported multiple problems when using external monitors.
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Users have reported that when connecting to an external monitor using the USB-C port, the image may not be displayed and a signal is not received. Another user said that the cause of the problem was that macOS 12.3 did not recognize the new protocol version of DisplayPort, and users had to agree to return a lower-quality earlier version.
Additionally, users stated that macOS 12.3 cannot connect to two external monitors, only one monitor will work. There is no user-proposed solution to this issue.
Since the official release of Apple’s macOS 12.3, users have reported a number of problems, such as causing the “crisis” of the M1 Mac that had the logic board replaced, and the inability of Xbox, PlayStation, and other third-party controllers through Bluetooth run.
