I am running Logic Pro 9.0.2 on a Macbook Pro (10.5.8), using a Steinberg MI4 audio/MIDI interface (whose drivers & firmware are up to date). This setup works fine with all my other apps (Ableton, Reaktor, Guitar Rig, etc), but when I fire up Logic, I get the error message in the subject line.

The CoreAudio preferences in Logic show 'none' for input device and nothing at all for output device. I reset the MIDI devices, just for grins, to no avail. All the plugins in my project have a line through them, even the Logic stuff like EXS24. The 'Logic Pro' menu on the apple toolbar contains items like 'About NewApplication' and 'Quit NewApplication' (!?), although the 'About' item correctly shows Logic Version 9.0.2 (1664.16). The usual 'File', 'Edit', etc.

Here are two things you can try. Go to Logic Preferences>Audio>Rc Simulator Aircraft Download. Core Audio and re-enable Core Audio. If it's already checked, uncheck it and check it again and. I have the most updated version of Logic Pro X and macOS High. No driver found, cant select a input or output. With Logic not running unplug the Mic then. Jul 11, 2016 Here are two things you can try. Go to Logic Preferences>Audio>Core Audio and re-enable Core Audio. If it's already checked, uncheck it and check it. I did the high sierra update and now i get Selected driver not found when i open logic pro x if i have my M-Audio C600 plugged in.as long as i dont have that.

Menus are missing. Although the loops browser works, the Library shows up as empty (hence all the missing plugins), even after I refresh the library. Thinking that the preferences might be screwed up somehow, I removed Library/Preferences/com.apple.logic.pro.plist, which fixed everything. At least until I had to reboot for another reason.

Now it gives me the same -10202 error whether or not there is a preferences file. Oddly, if I then pull the plug on the MI4, Logic tells me: 'Instrument “Steinberg MI4 MIDI” sends to a MIDI port named “Steinberg MI4 MIDI” of MIDI interface “Steinberg MI4 MIDI” which no longer exists.' So it is somehow cognizant of the device, even though no devices appear in the CoreAudio prefs. The Mac system settings default to the MI4 for input/output, and the Audio MIDI setup tool sees the MI4 w/o problem, as do all my other music apps except Logic. Unfortunately, reinstalling Logic is not an option, as I am 3000 miles from the install discs. And I cannot reinstall the 9.0.2 upgrade, as the installer in its wisdom will not let me force an install over an existing 9.0.2 version, and tells me I don't need the upgrade if I first move the Logic app out of the applications folder.

Any ideas about what might so totally screw up the program's initialization? E.g., other config or cache files? - John MacBook Pro Posted on Oct 28, 2009 5:16 PM. I eventually found a workaround for this without having to completely reinstall Logic: delete both com.apple.logic.pro preference files (i.e. In /Library/Preferences and ~/Library/Preferences), leaving the com.apple.logic.pro.cs file; then start Logic - everything works. If I then stop Logic and restart it, leaving the preferences file Logic created when it was just running, I am back to 'Selected Driver not found'.