Remote Play Direct Connect (IP Sharing) Crash after macOS Sequoia update

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sarcastic 18 Aug @ 5:45pm

Client:
macOS version: 15.6
MacBook Air M2 2022
Steam version: 1751405894

Host:
ASUS ROG Ally
Windows 11
Steam version:1751405894

Steam and games run fine on host device, host device has been used for streaming on this network to this macOS client before, no issues. The only change since last the last time remote play ran stable (like 2 or 3 days ago) has been updating to macOS 15.6 Sequoia from Sonoma on the client.

I was trying to stream KSP. Before changing any settings, Steam on Mac client shows green "Stream" button and can successfully launch KSP on host and launch the remote play streaming window with the KSP tessellated graphic background and the Steam UI throbber in the lower right corner. The throbber turns for about 2 sec and then the macOS "Game Mode" notification pops up. About half a second later the client streamer crashes. The game is still running on the host. Client now shows green "Connect" button, clicking this launches streamer, which crashes after a couple seconds of throbber/background same as before.

In the client taskbar Steam>Preferences>Remote Play, disabling "Allow Direct Connection (IP Sharing)" stops this streamer crash and allows normal playing. If "Allow Direct Connection" is set back to "Automatic (Enable)", the streamer crashes on launch, and the following four log entries are made in usr/Library/Application Support/Steam/Logs:

configstore_log.txt:

[2025-08-18 23:34:13] Flushed store 'userlocal' to '/Users/cam/Library/Application Support/Steam/userdata/86165020/config/localconfig.vdf' [2025-08-18 23:34:15] Flushed store 'userlocal' to '/Users/cam/Library/Application Support/Steam/userdata/86165020/config/localconfig.vdf' [2025-08-18 23:34:16] Flushed store 'userlocal' to '/Users/cam/Library/Application Support/Steam/userdata/86165020/config/localconfig.vdf' [2025-08-18 23:34:29] Flushed store 'userlocal' to '/Users/cam/Library/Application Support/Steam/userdata/86165020/config/localconfig.vdf' [2025-08-18 23:34:30] Flushed store 'userlocal' to '/Users/cam/Library/Application Support/Steam/userdata/86165020/config/localconfig.vdf' [2025-08-18 23:34:39] Flushed store 'userlocal' to '/Users/cam/Library/Application Support/Steam/userdata/86165020/config/localconfig.vdf' [2025-08-18 23:34:39] Flushed store 'userlocal' to '/Users/cam/Library/Application Support/Steam/userdata/86165020/config/localconfig.vdf' [2025-08-18 23:34:42] Flushed store 'userlocal' to '/Users/cam/Library/Application Support/Steam/userdata/86165020/config/localconfig.vdf' [2025-08-18 23:34:44] Flushed store 'userlocal' to '/Users/cam/Library/Application Support/Steam/userdata/86165020/config/localconfig.vdf' [2025-08-18 23:34:44] Flushed store 'userlocal' to '/Users/cam/Library/Application Support/Steam/userdata/86165020/config/localconfig.vdf' [2025-08-18 23:34:49] Flushed store 'userlocal' to '/Users/cam/Library/Application Support/Steam/userdata/86165020/config/localconfig.vdf'

console_log.txt:

[2025-08-18 23:34:31] ExecuteSteamURL: "steam://open/steam://settings"

webhelper.txt:

[2025-08-18 23:34:30] contextmenu_3_uid0-'Store Supe': WasHidden 0: (0, 0) 2x1 [2025-08-18 23:34:30] contextmenu_3_uid0-'Store Supe': WasHidden 1: (0, 0) 2x1

cloud_log.txt:

[2025-08-18 23:34:12] [AppID 2371090] Starting sync (down,) [2025-08-18 23:34:13] [AppID 2371090] Attempting to sync from local change number '0' to global change number '0' (full) [2025-08-18 23:34:13] [AppID 2371090] Download complete in build list [2025-08-18 23:34:13] [AppID 2371090] Successfully synced to ChangeNumber 0 [2025-08-18 23:34:13] [AppID 2371090] YldWriteCacheDirectoryToFile - empty vector, deleting '/Users/cam/Library/Application Support/Steam/userdata/86165020/2371090/remotecache.vdf'

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