


macOS 10.15.5 fixed a bug in the T2 chip wherein internal speakers in sound output devices may not appear in the preferences. Non-notarized apps were not allowed, meaning that any older audio plugin will no longer work. Catalina: Every third-party audio plugin should get “notarized” by Apple.Also, output audio devices vanished occasionally and only appeared upon restarting. Big Sur: Major issues with the Bluetooth connectivity when trying to pair audio devices to Macs.Some of the common audio-related update issues include: USB-related audio issues in 2018 Macs were quite common in discussion forums. While most developers are quick to release app updates, both the hardware and operating system can be a major headache. Major upgrades should not be taken lightly, you must have a backup of audio files. Musicians and sound engineers are usually particularly cautious of this because there are often hardware and software incompatibilities with a new release of macOS. Third-party plugins that integrate with your Mac can cause the sound to not work properly. Sound Not Working Due to Major Updates and Third-Party Apps
