I recently 'lost' my iMac due to a failing motherboard. I was running SO 3 Artist on it. My newer iMac is running 10.15.7 - it was the only option I had when the repair place condemned my now 'lost' iMac. While I installed SO3 I cannot activate it. From what I gather the earliest version I can run is SO4.5.4. I cannot afford to go to the newest, best and brightest. Am I out of luck basically OR can I still get SO4.5.4 from a legit source?