Oct 01, 2019 It would need to be 64 bit because MacOS Catalina will be dropping all support for 32 bit applications. If Portal 2 or any other game is not updated to 64 bit then it will no longer run on Mac operating systems after the next version is released.
By William Gallagher
Tuesday, September 03, 2019, 12:33 pm PT (03:33 pm ET) Time management games mac app store.
Steam will work fine on macOS Catalina, you just need to take some steps first
You'll have to ask Valve why they can't always update your 32-bit Steam client app to the 64-bit version that will run under macOS Catalina. But, 
AppleInsider is repeatedly being asked by users why their install is yelling at them that it needs an update. 
The update from Valve is ready, and the Steam client will work just fine under macOS Catalina —you just may have to prepare the ground a little.
Specifically, the problem is with the Steam client on your Mac. Even if you have shortcuts to your favorite games, they all launch through that Mac app, and it's possible that your copy of that is still a 32-bit app.
If you're stuck with that 32-bit version, you have to manually get rid of it and then reinstall a new copy.
Oh, yes, it is. The Steam service is fine and so are at least most of your games. It's just the Steam client you have to fix.
Trash talk
One quick tip: do be certain to have your Steam account name and password to hand. You clicked that Remember Me button years ago, but this is going to appear to Steam as if you're setting up a new computer.
You'll have to be able to log in again, and you'll have to have access to email to get the verification codes that you'll be sent.
When you're sure you have the account details, start with this:
- Quit Steam
- Go to your Applications folder
- Drag Steam out to the Trash
If you have Hazel installed on your Mac, it will spot that you've removed an application and will offer to also delete all of that app's supporting files. As good as that is, as so much handier it is than going through the whole process of deleting them manually, don't let Hazel do it.
That's because Hazel will do too good a job and it'll remove everything. We want rid of a lot of Steam, but not the bit that includes your games.
If you have Hazel on your Mac, it will offer to delete Steam's supporting files. But you need the ones to do with your installed games, so click Keep All.
So next, you find all of Steam's supporting files from the Finder.
Hold Shift, Command and press G. In the Go to Folder dialog that appears, enter this: ~/Library/Application Support/ and click Go.
Hold down Command and Shift, then press the letter G to call up this Go To Folder dialog. You're going to get very familiar with it.
In the folder that opens, scroll to find the Steam folder, and delete everything in there except /steamapps. That directory is where your games live, and keeping that folder preserves the installs.
Next, repeat that Go to Folder with each of the following. In every one, look for Steam or Valve files.
- ~/Library/Caches/
- ~/Library/Logs/
- ~/Library/Preferences/
- ~/Library/Cookies/
- ~/Library/Saved Application State/
- ~/Library/LaunchAgents/
Do be careful to solely select Steam or Valve folders, but then drag them to the Trash and empty it.
Almost done
Now go to store.steampowered.com where you'll see an Install Steam button at the top right of the site.
Work through the steps it tells you. Then log back in to your Steam account, and you're done.
There is, seriously, nothing you can do about games developers who haven't moved to 64-bit binaries. Barring a virtual machine or something else drastic, those games won't work under Catalina. But at least taking these steps now will save you having that awful moment when you've updated to Catalina, the Steam client won't load at all, and it appears as if you've lost
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your Steam games.Keep up with AppleInsider by downloading the AppleInsider app for iOS, and follow us on YouTube, Twitter @appleinsider and Facebook for live, late-breaking coverage. You can also check out our official Instagram account for exclusive photos.
Apple began transitioning to 64-bit hardware and software technology for Mac over a decade ago, and all modern Macs now include powerful 64-bit processors that can run advanced 64-bit apps. These apps can access dramatically more memory, enable faster system performance, and take advantage of technologies that define today's Mac experience, such as Metal graphics acceleration.
Apple has been working with developers to transition their apps, and in 2018 Apple informed them that macOS Mojave would be the last version of macOS to run 32-bit apps.
Apple's transition to 64-bit technology is now complete. Starting with macOS Catalina, 32-bit apps are no longer compatible with macOS. If you have a 32-bit app, please check with the app developer for a 64-bit version.
Opening 32-bit apps
When you attempt to open a 32-bit app, you will see an alert that the app needs to be updated to work with this version of macOS, or that the app is not optimized for your Mac and needs to be updated.
macOS Catalina
macOS Mojave and macOS High Sierra
If you haven't upgraded to macOS Catalina, you can still open and use the app, but you should check with the app developer for a 64-bit version that also works with the latest macOS.
How to find 32-bit apps on your Mac
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System Information can find 32-bit apps that are installed on your Mac: Rpg games ranked for mac.
- Choose Apple menu > About This Mac, then click the System Report button.
- Select Legacy Software in the sidebar. All legacy software is 32-bit.
- If you don't see Legacy Software in the sidebar, select Applications in the sidebar, then check the list of apps on the right. The column labeled ”64-Bit (Intel)” shows ”No” for apps that are 32-bit.
When upgrading to macOS Catalina, the installer shows a list of recently used apps that are 32-bit. You can review this list before choosing whether to cancel or continue the installation:
Steam Mac Catalina Telling What Games Are 32 Bit Download
macOS Catalina also shows a prohibitory symbol over the icon of each 32-bit app in the Finder, letting you know that the app will not open.
How to contact the app developer
The developer (or vendor) is the person or company that made the app. The easiest way to find contact information for an app's developer is to search the web for their name or the name of their app. Learn more about contacting third-party vendors.
To find the name of the developer:
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- Select the app in the Finder.
- Choose File > Get Info from the menu bar.
- Look for copyright information in the Info window. For example, Apple is the developer of this app: