Farming Simulator 19 Steam-issued product key

[MaxineUltima]

We just recently purchased the new Mac Mini (2024) but FS19 crashes after 5-10 min of playtime. Apparently it is a common issue that the FS games don't mesh well the Mac interface. I've been in talks with Giant to fix the issue. They say I need to download the game directly from their portal. But to do that I need a product key which I cannot find anywhere on Steam. I purchased FS19 from Steam but I cannot find a key anywhere.