A) Dont believe everything Arturia tells you... They have had similar issues in the past that either required a fix from them and not to Logic, to resolve the issues... despite their original claims to the opposite... or it was a setup problem by the User... which Arturia failed to properly recognize and troubleshoot.
B) A client of mine has a Keylab 61 working perfectly with Logic Pro X 10.2.1 and El Capitan 10.11.3... I just double checked with him and he confirmed he has no issues at this time.
So.. I would fully uninstall your 61... by shuttimg down your mac.. then unplugging your 61.
Now restart your Mac... and remove any entries for the 61 in OS X's Midi Audio Setup utility... then delete Logic's Control Surface preferences...
and restart your Mac...
You can resolve many issues by restoring Logic Pro X back to its original settings. This will not impact your media files. To reset your Logic Pro X user preference settings to their original state, do the following:
- Quit Logic Pro X
- In the Finder, choose Go to Folder from the Go menu.
- Type ~/Library/Preferences in the "Go to the folder" field.
- Press the Go button.
- Remove the com.apple.logic10.plist file from the Preferences folder. Note that if you have programmed any custom key commands, this will reset them to the defaults. You may wish to export your custom key command as a preset before performing this step. See the Logic Pro X User Manual for details on how to do this.
- If you are having trouble with a control surface in Logic Pro X, then you may also wish to delete the com.apple.logic.pro.cs file from the preferences folder.
- Restart the computer.
Note: If you cannot find any of the files listed above, you didn’t follow the instruction correctly! 🙂
Once the Mac has restarted, install all Arturia software... and then, unless required to earlier.. plug in your 61... and restart Mac again and then test under 10.2.1...