Steam app issue. :: Steam for Mac

Biberkopf 10 Sep @ 12:41am

Same for me. Fresh install and all.

#1

Biberkopf 10 Sep @ 12:47am

After a while it tells me that „steamwebhelper“ failed to load and gives me 5 options. None of them do anything though.

#2

棋坛之神 10 Sep @ 2:03am

Same for me. Fresh install and all.

#3

bearded3dprinter 10 Sep @ 2:03am

Yeah having this issue too

#4

saoooo 10 Sep @ 2:53am

me too. this is a new laptop and i have barely set up anything else?

#5

Biberkopf 10 Sep @ 3:18am

Some more info here: https://www.reddit.com/r/macgaming/comments/1n1xfsl/steam_wont_run_on_macos_sequoia_1561_bootstrapper/

None of the fixes from that thread worked for me.

#6

Maze_Runner 10 Sep @ 4:35am

Same for me, I sent a support chat to Steam hope I will get a decent response.

#7

klein__celina 10 Sep @ 5:18am

same with me. set up my iMac 2 hours ago and steam teels me "steamwebhelper" failed to work. i am glad i´m not the only one with this issue!

#8

HappySeppi 10 Sep @ 7:17am

Just dropping in to say I have the same issue. Just got a MacBook M1 Pro and installed Steam.
Let's hope it's a new issue that just popped up and will be fixed soon

#9

Zając-xxl 10 Sep @ 7:46am

Same problem here.
I tried to install steam on new out of the box MBP 16 m4pro OS:15.6.1 (24G90)

Steam does not open at all. After 30-40 second I get the screen with 5 options. None of them help.

When I go to apps right click "show contents" than go to

Contents > macOS > steam_osx

it runs in terminal and sometimes it returns this:

/Applications/Steam.app/Contents/MacOS/steam_osx ; exit; saw@localnet ~ % /Applications/Steam.app/Contents/MacOS/steam_osx ; exit; src/vstdlib/osversion.cpp (393) : Assertion Failed: Unsupported macOS version 15.6.1 src/vstdlib/osversion.cpp (393) : Assertion Failed: Unsupported macOS version 15.6.1 [2025-09-10 16:34:41] Startup - updater built Mar 15 2022 17:15:24 Saving session... ...copying shared history... ...saving history...truncating history files... ...completed.

than stops

Sometimes it goes like this:

/Applications/Steam.app/Contents/MacOS/steam_osx ; exit; saw@localnet ~ % /Applications/Steam.app/Contents/MacOS/steam_osx ; exit; src/vstdlib/osversion.cpp (393) : Assertion Failed: Unsupported macOS version 15.6.1 src/vstdlib/osversion.cpp (393) : Assertion Failed: Unsupported macOS version 15.6.1 [2025-09-10 16:43:13] Startup - updater built Mar 15 2022 17:15:24 [2025-09-10 16:43:13] Startup - updater built Aug 28 2025 17:08:07 [2025-09-10 16:43:13] Startup - Steam Client launched with: '/Users/saw/Library/Application Support/Steam/Steam.AppBundle/Steam/Contents/MacOS/steam_osx' found breakpad via in process memory: '/Users/saw/Library/Application Support/Steam/Steam.AppBundle/Steam/Contents/MacOS/Frameworks/Breakpad.framework/Versions/A/Resources' Installing breakpad crash handler [2025-09-10 16:43:13] Loading cached metrics from disk (/Users/saw/Library/Application Support/Steam/Steam.AppBundle/Steam/Contents/MacOS/package/steam_client_metrics.bin) [2025-09-10 16:43:13] Failed to load cached hosts file (File 'update_hosts_cached.vdf' not found), using defaults [2025-09-10 16:43:13] Using the following download hosts for Public, Realm steamglobal [2025-09-10 16:43:13] 1. https://client-update.steamstatic.com, /, Realm 'steamglobal', weight was 1, source = 'baked in' SteamID: 0, universe Public [2025-09-10 16:43:13] Weryfikowanie instalacji… [2025-09-10 16:43:13] Verifying file sizes only [2025-09-10 16:43:13] Verification complete [2025-09-10 16:43:13] Not updating bootstrapper: No update necessary: current version 4.0, package version 4.0 objc[2132]: Class GURLHelper is implemented in both /Users/saw/Library/Application Support/Steam/Steam.AppBundle/Steam/Contents/MacOS/steam_osx (0x1048b3328) and /Users/saw/Library/Application Support/Steam/Steam.AppBundle/Steam/Contents/MacOS/steamui.dylib (0x117c77178). This may cause spurious casting failures and mysterious crashes. One of the duplicates must be removed or renamed. Steam logging initialized: directory: /Users/saw/Library/Application Support/Steam/logs Loaded SDL version release-3.2.6-1081-g3572be399 objc[2132]: Class GURLHelper is implemented in both /Users/saw/Library/Application Support/Steam/Steam.AppBundle/Steam/Contents/MacOS/steam_osx (0x1048b3328) and /Users/saw/Library/Application Support/Steam/Steam.AppBundle/Steam/Contents/MacOS/vgui2_s.dylib (0x1195a5068). This may cause spurious casting failures and mysterious crashes. One of the duplicates must be removed or renamed. objc[2132]: Class GURLHelper is implemented in both /Users/saw/Library/Application Support/Steam/Steam.AppBundle/Steam/Contents/MacOS/steam_osx (0x1048b3328) and /Users/saw/Library/Application Support/Steam/Steam.AppBundle/Steam/Contents/MacOS/chromehtml.dylib (0x11bf25b18). This may cause spurious casting failures and mysterious crashes. One of the duplicates must be removed or renamed. Running query: 1 - GpuTopology Response: Exit code: -5 ChildProcessQuery: failed to read response from child CGpuTopology: failed to run gpu topology querydyld[2147]: Library not loaded: @executable_path/../Frameworks/Chromium Embedded Framework.framework/Chromium Embedded Framework Referenced from: <B9BF68A4-D486-3BD5-8F3C-1C7EC8F98AF9> /Users/saw/Library/Application Support/Steam/Steam.AppBundle/Steam/Contents/MacOS/Frameworks/Steam {LINK REMOVED} Helper Reason: tried: '/Users/saw/Library/Application Support/Steam/Steam.AppBundle/Steam/Contents/MacOS/Frameworks/Steam {LINK REMOVED} Embedded Framework.framework/Chromium Embedded Framework' (no such file) objc[2132]: Class GURLHelper is implemented in both /Users/saw/Library/Application Support/Steam/Steam.AppBundle/Steam/Contents/MacOS/steam_osx (0x1048b3328) and /Users/saw/Library/Application Support/Steam/Steam.AppBundle/Steam/Contents/MacOS/steamclient.dylib (0x12ac01e90). This may cause spurious casting failures and mysterious crashes. One of the duplicates must be removed or renamed. Created mapping SteamChrome_MasterStream_uid501_spid2132_mem when set to fail if created dyld[2149]: Library not loaded: @executable_path/../Frameworks/Chromium Embedded Framework.framework/Chromium Embedded Framework Referenced from: <B9BF68A4-D486-3BD5-8F3C-1C7EC8F98AF9> /Users/saw/Library/Application Support/Steam/Steam.AppBundle/Steam/Contents/MacOS/Frameworks/Steam {LINK REMOVED} Helper Reason: tried: '/Users/saw/Library/Application Support/Steam/Steam.AppBundle/Steam/Contents/MacOS/Frameworks/Steam {LINK REMOVED} Embedded Framework.framework/Chromium Embedded Framework' (no such file) Created mapping SteamChrome_MasterStream_uid501_spid2132_mem when set to fail if created dyld[2151]: Library not loaded: @executable_path/../Frameworks/Chromium Embedded Framework.framework/Chromium Embedded Framework Referenced from: <B9BF68A4-D486-3BD5-8F3C-1C7EC8F98AF9> /Users/saw/Library/Application Support/Steam/Steam.AppBundle/Steam/Contents/MacOS/Frameworks/Steam {LINK REMOVED} Helper Reason: tried: '/Users/saw/Library/Application Support/Steam/Steam.AppBundle/Steam/Contents/MacOS/Frameworks/Steam {LINK REMOVED} Embedded Framework.framework/Chromium Embedded Framework' (no such file) Created mapping SteamChrome_MasterStream_uid501_spid2132_mem when set to fail if created dyld[2153]: Library not loaded: @executable_path/../Frameworks/Chromium Embedded Framework.framework/Chromium Embedded Framework Referenced from: <B9BF68A4-D486-3BD5-8F3C-1C7EC8F98AF9> /Users/saw/Library/Application Support/Steam/Steam.AppBundle/Steam/Contents/MacOS/Frameworks/Steam {LINK REMOVED} Helper Reason: tried: '/Users/saw/Library/Application Support/Steam/Steam.AppBundle/Steam/Contents/MacOS/Frameworks/Steam {LINK REMOVED} Embedded Framework.framework/Chromium Embedded Framework' (no such file) Created mapping SteamChrome_MasterStream_uid501_spid2132_mem when set to fail if created dyld[2156]: Library not loaded: @executable_path/../Frameworks/Chromium Embedded Framework.framework/Chromium Embedded Framework Referenced from: <B9BF68A4-D486-3BD5-8F3C-1C7EC8F98AF9> /Users/saw/Library/Application Support/Steam/Steam.AppBundle/Steam/Contents/MacOS/Frameworks/Steam {LINK REMOVED} Helper Reason: tried: '/Users/saw/Library/Application Support/Steam/Steam.AppBundle/Steam/Contents/MacOS/Frameworks/Steam {LINK REMOVED} Embedded Framework.framework/Chromium Embedded Framework' (no such file) Created mapping SteamChrome_MasterStream_uid501_spid2132_mem when set to fail if created dyld[2157]: Library not loaded: @executable_path/../Frameworks/Chromium Embedded Framework.framework/Chromium Embedded Framework Referenced from: <B9BF68A4-D486-3BD5-8F3C-1C7EC8F98AF9> /Users/saw/Library/Application Support/Steam/Steam.AppBundle/Steam/Contents/MacOS/Frameworks/Steam {LINK REMOVED} Helper Reason: tried: '/Users/saw/Library/Application Support/Steam/Steam.AppBundle/Steam/Contents/MacOS/Frameworks/Steam {LINK REMOVED} Embedded Framework.framework/Chromium Embedded Framework' (no such file) ^[[B^[[B^[[B^[[B^[[CCreated mapping SteamChrome_MasterStream_uid501_spid2132_mem when set to fail if created dyld[2160]: Library not loaded: @executable_path/../Frameworks/Chromium Embedded Framework.framework/Chromium Embedded Framework Referenced from: <B9BF68A4-D486-3BD5-8F3C-1C7EC8F98AF9> /Users/saw/Library/Application Support/Steam/Steam.AppBundle/Steam/Contents/MacOS/Frameworks/Steam {LINK REMOVED} Helper Reason: tried: '/Users/saw/Library/Application Support/Steam/Steam.AppBundle/Steam/Contents/MacOS/Frameworks/Steam {LINK REMOVED} Embedded Framework.framework/Chromium Embedded Framework' (no such file)

#10