The easiest way to do this is to click the Apple icon in the upper left, then About this Mac, then System Report, and scroll down to Software/Applications. Your Mac will take a while to gather. Some general solutions you could try are: 1) Run Steam as administrator 2) Restart your PC 3) Verify the game files (Right click the game in steam library, click properties, then local files and then verify integrity of game files).
Steam and macOS 10.15 Catalina
Will Steam continue to work after macOS 10.15 Catalina?
Yes, there is now a Steam application that is 64-bit. Download it here.See additional ways to play 32-bit Mac apps below.
What is happening with 32-bit Football Manager?
Apple is dropping support for 32-bit Mac applications in October 2019 with their release of macOS Catalina 10.15.See Apple's relevant support article.
Can I keep playing my Football Manager games that I purchased that are 32-bit?
How To Play 32 Bit Steam Games On Mac Catalina
Yes. You will still have access to your 32-bit Mac games in your Steam Library. Steam won't remove these games from your library and they will continue to work on macOS 10.14 Mojave and earlier, Windows and in many cases Linux as well.What are my options to make sure I can continue to play my 32-bit Football Manager apps?
There are several options that will allow you to keep playing your 32-bit Mac apps. The good news is we have Steam Play, which means that when you purchased your game on Steam you get a copy of this game on each OS that game supports. You will still be able to play these games on macOS 10.14 Mojave and earlier, Windows and in many cases Linux as well.Options to keep 32-bit Football Manager games playable on a Mac computer
- Consider not upgrading to macOS 10.15 or above. By staying on macOS 10.14 Mojave or older you will ensure that your 32-bit apps are still playable on your Mac computer.
- After upgrading to macOS 10.15 Catalina, consider installing macOS 10.14 Mojave on a separate APFS volume on your computer along with Steam. This will allow you to flip over to macOS 10.14 on restart of your computer where you can continue to play all of your 32-bit Mac games. More info here.
- Use Bootcamp on Mac to launch your games in Windows on your Mac computer. More info about Bootcamp here.
Apple has ended 32-bit support with the release of OS Catalina, meaning many older games purchased may not run on the free OS update.
Moreover, Steam users will also want to hold off on the update, as the Steam client itself is a 32-bit application.
How To Play Steam Games On Mac Catalina Fire
Steam Games Catalina
MacGamerHQ has compiled a list of affected games on MacOS, with many games like the LEGO games no longer working in the new OS.
Mac Catalina Compatible Games
As of this writing even Valveās first-party games like Team Fortress 2 and Portal, some of the first high profile games to come to Mac, have also been affected by the update.
Steam Games For Mac
While the update may seem sudden, users of High Sierra and Mojave will probably have encountered warnings that Apple would make the sheer jump to 64-bit only.
No statement has been issued by Valve or Apple regarding the issue as of this writing.