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Garageband audio /core audio not working? - Avid Pro Audio ...
https://duc.avid.com/showthread.php?t=135743#:~:text=Re%3A%20Garageband%20audio%20%2Fcore%20audio%20not%20working%3F%20This,between%20%27larger%20buffer%20size%27%20and%20%27smaller%20buffer%20size%27.
Core audio not available. - Apple Community
https://discussions.apple.com/thread/3389238
HDD > users > home folder > library > Application Support > Garageband > Working Copies. The files inside this folder may be corrupted. Delete them all and close the folder. Open Garageband and see if that helps. If it doesn't, and you're unable to chase down the problem, one solution would be to try a complete uninstall and reinstall of GB.
GarageBand: "Core Audio Plug-in EXS24... not available ...
https://support.apple.com/en-us/HT203234
GarageBand: "Core Audio Plug-in EXS24... not available" error when loading a song. If you create a song in GarageBand on one computer and then try to open it in GarageBand on another computer, you may get an alert message that says, "Core Audio Plug-in EXS24... not available." This can happen if you create the song in GarageBand 2 and then try to open it in …
Core Audio Not Available - Apple Community
https://discussions.apple.com/thread/1885856
To fix your problem go to: HDD > users > home folder > library > Application Support > Garageband > Working Copies. Inside this folder you'll find the offending corrupted files. You can delete them all and close the folder. Open Garageband and the "Learn to play" lessons will work just like the first day you got them.
"Core Audio is Not Available" : GarageBand
https://www.reddit.com/r/GarageBand/comments/2n4cyx/core_audio_is_not_available/
"Core Audio is Not Available" I've been recording tracks on my 2009 Macbook Pro since I got it, but with this most recent update, all the sudden I am not able to hear or play anything on Garageband. I have sound elsewhere (Itunes, Chrome, etc) and my input jack is working properly per my system sound preferences, but no luck with Garageband.
Garageband audio /core audio not working? - Avid Pro Audio ...
https://duc.avid.com/showthread.php?t=135743
Re: Garageband audio /core audio not working? This is a known issue with Garageband and Apple is working on a fix. In the meantime, you can regain correct playback by going to the Preferences in Garageband and toggling the 'Optimize for' radio button between 'larger buffer size' and 'smaller buffer size'.
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