Rewire not working: Reason to Ableton (both 32 bit)

[defex]

Hello,
I would like to resurrect some old songs that i startet >15 years ago.

I'm on OSX Sierra 10.12.6 on a Trashcan MacPro.
and I actually found my Reason 5.0.1 (32 bit) install files and my tracks are opening just fine.
that's why i re-installed Ableton Live 9.77 in 32 bit.

I open Ableton first. the settings seem to be ok, only suspicious: the Rewire Multicore setting is greyed out, but i can switch it to ON.
When i then open Reason it still uses my Audio Interface and not Rewire. The Rewire LED stays grey.
In Ableton I obviously then don't get Reason as a Audio Input or Midi Device.

I also checked the library files in /Library/Application Support/Propellerhead Software/ReWire and the same in the User Library.
The files are there and if i delete them both applications write them back when opening them the next time.

Any suggestions what might be wrong?
Thanks for your help!

[pottering]

https://help.ableton.com/hc/en-us/artic ... ire-issues

Note that Rewire got updated from time to time too, maybe that Reason version is just too old.