I had the same problem and it is because of the new e-licenser software of Syncrosoft.
1. make a new start of osx.6
2. do NOT open anything what can use the dongle.
3. Start installing new syncrosoft software and turn off again.
4. make new start of osx.6 and run control center of syncrosoft to check installed licenses.
5. Now start your DAW and everything should work and scan correctly.
This is how it was working on my macbook.
BR
Nico.