Hello,

yup, it's right. Steam application is still "Intel only", so the application needs "translation".

https://support.apple.com/en-us/HT211861

If you want to read more about this - especially opinions ;-)
have a look here:

https://steamhost.cn/steamcommunity_com/discussions/forum/2/4417479689916000468/

I have Rosetta 2 installed already, but the installation still doesn't work for me (Ventura 13.2.1 M2 MacBook Air). I drag Steam into the applications folder from within the downloaded steam.dmg file, then double click it but nothing happens (except the first time, when it says it's a file downloaded from the Internet). So the installation never completes. There is nothing in any console log, and no clue what is happening. It's a brand new machine which has never previously had Steam installed. I'm beginning to think it simply doesn't work anymore.

trash it and redownload. It still works, cause I'm using it now. You may want to delete the support files under ~/Library/Application Support/Steam since something might be corrupted.

I have already tried that. Did you install it when already running 13.2.1? Or before with an earlier version. The installer doesn't appear to work right now.

Hi again,

not sure this helps but curious what happens:

Copy and paste the following line of code into the Terminal app, and hit Return.
softwareupdate --install-rosetta

Source: https://www.makeuseof.com/what-is-rosetta-2-mac/

It's already installed, things like VLC require and are using it. The command line install just says "Install of Rosetta 2 finished successfully", but it makes no difference. Nothing at all happens when running the Steam app copied out of the installer download image. No error messages, nothing.

Messages in console app?

There are no messages in the console app.

So next attempt: try the hints of this article which you didn't go thru already:

https://macreports.com/steam-wont-open-on-mac-fix/

Pretty interested especially about the result of starting Steam via Terminal.

In my case I have to start steam_osx = Unix Executable File
If I double-click it goes like

/Applications/Steam.app/Contents/MacOS/steam_osx ; exit;
[2023-04-18 20:46:01] Startup - updater built Jul 28 2021 17:53:07
[2023-04-18 20:46:01] Startup - updater built Mar 24 2023 10:10:36
[2023-04-18 20:46:01] Startup - Steam Client launched with: '/Users/thomas/Library/Application Support/Steam/Steam.AppBundle/Steam/Contents/MacOS/steam_osx'
found breakpad via in process memory: '/Users/thomas/Library/Application Support/Steam/Steam.AppBundle/Steam/Contents/MacOS/Frameworks/Breakpad.framework/Versions/A/Resources'
Installing breakpad crash handler
[2023-04-18 20:46:01] Loading cached metrics from disk (/Users/thomas/Library/Application Support/Steam/Steam.AppBundle/Steam/Contents/MacOS/package/steam_client_metrics.bin)
[2023-04-18 20:46:01] Using the following download hosts for Public, Realm steamglobal
[2023-04-18 20:46:01] 1. https://client-update.akamai.steamstatic.com, /, Realm 'steamglobal', weight was 1000, source = 'update_hosts_cached.vdf'
[2023-04-18 20:46:01] 2. https://cdn.cloudflare.steamstatic.com, /client/, Realm 'steamglobal', weight was 1, source = 'update_hosts_cached.vdf'
[2023-04-18 20:46:01] 3. http://media.steampowered.com, /client/, Realm 'steamglobal', weight was 1, source = 'baked in'
SteamID: 0, universe Public
[2023-04-18 20:46:01] Verifying installation...
[2023-04-18 20:46:01] Verification complete
[2023-04-18 20:46:01] Not updating bootstrapper: No update necessary: current version 4.0, package version 4.0
[2023-04-18 20:46:01] Shutdown
logout

Saving session...
...copying shared history...
...saving history...truncating history files...
...completed.
Deleting expired sessions...9 completed.

xxx@Macbook-Air ~ % /Applications/Steam.app/Contents/MacOS/steam_osx
src/steamexe/steamglobalinstance.cpp (389) : m_NamedPipe >= 0
src/steamexe/steamglobalinstance.cpp (389) : m_NamedPipe >= 0
[2023-04-19 09:35:53] Startup - updater built Mar 15 2022 17:15:24
exec failed: 'Bad CPU type in executable'

xxx@Macbook-Air ~ % file /Applications/Steam.app/Contents/MacOS/steam_osx: Mach-O 64-bit executable x86_64

Finder says steam_osx is Kind: Unix Executable File, size: 4,319,568 bytes, modified 23 March 2022.

It's also possible that it's not steam_osx that's the problem, I guess. It could be trying to load another executable or library.

More information: confirmation that Rosetta is installed:

xxxxx@MacBook-Air MacOS % lsbom -f /Library/Apple/System/Library/Receipts/com.apple.pkg.RosettaUpdateAuto.bom
./Library/Apple/usr/lib/libRosettaAot.dylib 100755 0/0 320960 2065013787
./Library/Apple/usr/libexec/oah/RosettaLinux/rosetta 100755 0/0 540360 1520249700
./Library/Apple/usr/libexec/oah/libRosettaRuntime 100755 0/0 381680 1322711071
./Library/Apple/usr/share/rosetta/rosetta 100644 0/0 64 1875722922

xxx@MacBook-Air MacOS % /usr/bin/pgrep -q oahd && echo Installed || echo Not installed
Installed

So the question is perhaps, why is that X86 executable not being processed by Rosetta.

Check out for this: exec failed: 'Bad CPU type in executable'

Sounds pretty wrong IMHO.

https://www.technewstoday.com/bad-cpu-type-in-executable/
sounds like Steam or some components are still for 32-bit??

I don’t hold out much hope but I raised a support ticket 6 hours ago. As yet, no response.

Yeah, why not. Good luck!

OK, I have had some success, I have the client running at least.

The problem appeared to be the existence of some legacy x86 libraries in User/<acct>/Library/Application Support/Steam which was a surprise to me, as I haven't had Steam installed for 6 years and never on this Mac (or the previous one either) but they were still there. They must have been migrated by Migration Assistant each time I got a new Mac. I actually thought I had checked for that, but it seems I wasn't thorough enough.

Anyway, once I removed them (being careful to leave the SteamApps folder and its contents) the installer ran OK, proceeding with its downloads etc, and the client is now installed and running. I haven't tried running any games yet. One definitely won't work as it's 32 bit, and a couple of others are downloading huge updates. But it's looking promising.

Incidentally, they did say that M series Macs are not officially supported.