Anyone have this issue:

My iMac (5k, 27", late 2015) running 10.15.5 (Catalina) will not "see" my Apogee Ensemble (Thunderbolt) on power up.

The front panel of the Apogee shows that it's connected, and it also shows as connected in my System Report. But... it's not. Doesn't show in Apogee Control, doesn't show in System Prefs etc.

The only way I can get it to pop up is to either:

1. Unplug the unit and then plug it back in (PITA, given that the sockets are on the back of both devices)
2. 2 Power the device off, go into Terminal to kill CoreAudio, then power back on works (sometimes)

I've had the unit for quite some time now and had zero problems with it until now. I can't tie it back to any particular moment in time when it started. Apogee support (which is always excellent) had suggested that there could be a dodgily installed plug in so I removed everything, including the Apogee drivers etc., and reinstalled it all from scratch. Tested with a reboot after every plug in was installed (which is every bit as tedious as it sounds) and had no issues. Then, the next day, I couldn't see the device again.

Clearly it's not a deal breaking issue, I can get it to work, but it's a pain in the rear to have to sort it out before I can crack on...

Any ideas?

No one? This thing is driving me nuts. Today... can't get anything to work. Unplugging, nope. Command lines in Terminal, nope.

Yes. I too have a similar problem. For a while I got round it by swapping the Thunderbolt cables in the back of the iMac - one being a back-up drive, the other the Ensemble. But now... nothing. I'm waiting for a reply from Apogee Support. I'll let you know.

I haven't had the issue for a while but that might be because I've not been turning my rig off at night of late (I just sleep it all)... But I also had a fusion-drive fail on that machine. I took the decision to get an OWC SSD upgrade for it and installed that (essentially creating a whole new machine with fresh installation of OS, apps, plugins etc). And I'm not sure I've had the problem since then either.

I just powered everything down and restarted... all came back fine, so I guess the "new machine" fixed it.

That's good.

The reply from Apogee:

Try this out:

https://apogeedigital.com/downloads/..._Installer.dmg

Download that software package, then do the following in this order:

Run the included UNinstaller
Restart your Mac
Run the INstaller
Restart your Mac
Run the INstaller again
Restart your Mac
Go to System Prefs > Security > General, and hit the ALLOW button, like this:
​
Restart your Mac
Plug in your Ensemble - does it show up in System Prefs > Sound?