Non-volatile RAM (NVRAM) or parameter RAM (PRAM) is the type of memory your Mac uses to remember settings, such as the time and date and current volume settings.

If you can’t get the app to work, it might be time to replace it with a similar one that does. Apple has made serious changes to the macOS permissions system over the last few revisions, so some outdated apps might not work. Look for an updated version to download, just in case the issues were caused by incompatibility. If everything seems fine, try deleting and reinstalling the app. Apps like Adobe Audition and Audacity allow you to specify an input device separate from the one selected in the audio “Input” settings under “System Preferences.” You can try checking the app’s preferences to see if there are separate settings for input devices.

If a specific app isn’t working, it might be the source of the problem. With the right source selected and any required permissions granted, your microphone should work. You can then approve or deny permission as you see fit by checking or unchecking the boxes next to the apps. Click the Padlock icon at the bottom left to authenticate with your admin password (or Touch ID, or Apple Watch prompt).

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