If you run Reason 7 under Mac OS Yosemite (or El Capitan) and get an alert that says:
There is a problem with your Ignition Key installation…”
here is a tip that might work:
Download and install the Reason 7.1.2 update
, which brought Yosemite compatibility. While it’s not officially tested and supported, Reason 7.1.2 should work under El Capitan as well (thee are users running this configuration successfully).