iMessage login loop on OC 1.0.7 — root cause identified (accountsd credential plugin failure)

[michmcca]

System: Hackintosh, OpenCore 1.0.7, macOS Sequoia 15, iMac19,1 SMBIOS

Problem: Messages shows login screen, briefly shows message list, then immediately bounces back to login. This happens with both MacPro7,1 and iMac19,1 SMBIOS. Messages worked fine on OC 0.8.5 + Sequoia. The issue appeared after upgrading to OC 1.0.7.

Root cause (identified via log analysis):

The failure chain is:

contactsd launches in the wrong launchd domain (user/501 instead of gui/501), causing imagent to fail with XPC error 159 — Sandbox restriction when trying to reach com.apple.contactsd.persistence

After working around that (bootstrapping contactsd into gui/ domain manually), accountsd repeatedly logs: "No plugin provides credentials for account. Falling back to legacy behavior."

This causes imagent to receive accountDisabled notifications ~30 seconds after login, tearing down the IDS session and bouncing back to the login screen

The audit session IDs confirm the domain mismatch: imagent runs in asid=100001 (gui/) while contactsd runs in asid=100027 (user/), preventing XPC bootstrap lookup between them.

Workarounds attempted (partial fixes only):

SIP set to custom config (03000000) — eliminated some sandbox errors but not the credential plugin failure

Manually bootstrapped contactsd into gui/ domain — fixed XPC error 159

Pre-created missing ByHost preference files for com.apple.imservice.SatelliteSMS, com.apple.imservice.ids.iMessageLite, com.apple.imservice.RCS — eliminated sandbox write failures

These changes together get Messages to briefly show the message list before being logged out, but accountsd still fails to provide credentials

Key question: Did something change between OC 0.8.5 and 1.0.7 that affects how launchd establishes the GUI session at login, causing services like contactsd to land in the wrong bootstrap domain? And/or is there a known fix for the accountsd credential plugin failure on Hackintosh under newer OC versions?

Happy to provide full log output if helpful. Thanks.

[Slice]

I don't know what is happen with OpenCore and can advice to try Clover.

[XanthraX]

Your serials do not match SMBIOS. I use OCAT to manage OpenCore. Using OCAT, go to PI (PlatformInfo). There, in the right panel, choose your Mac model (iMac 19.1 if this is your choice), then press "generate" 3-4 times. You will be nagged to enroll this Mac in System Preferences > Apple Account. Only after this is done and your Mac is recognized by Apple, iMessage will work properly.