Sorry for the delay @DTS Engineer yes I can sign in to an Apple Account via System Preferences although the UX doing that has been weird for some time, this time it asked for the SMS sent 2FA code, then asked for again (rejected on second entering), if I quit System preferences and open it again it shows me as signed in with the standard warning that there are certain iCloud things I can't do on a VM. .. I've seen this ever since we could sign in to this on VMs though so I don't think is indicates any other underlying issue, so in the claude output below that's a red herring I think ..
Claude's investigation output follows:
TEST: does signing in to an Apple Account let apsd mint its SEP-backed BAA identity?
ANSWER: No. Failures continue, byte-identical, after a confirmed sign-in.
Environment
macOS 27.0 beta 6 (26A5416b), Virtualization.framework guest (rockit VM "ggb6-quinn-test")
Never MDM-enrolled: "Enrolled via DEP: No / MDM enrollment: No"
Boot 14:50:40. Apple Account sign-in completed ~14:59:04. Log captured to 15:03:11.
Sign-in confirmed in System Settings UI: account name shown under "Apple Account".
apsd failure counts, whole boot (13 min)
18 APSBAAClientIdentityProvider failed to obtain a BAA cert
72 sepkey unable to generate key
18 Told not to connect after fetching server bag
377 Connected on 0 interfaces
0 Connected on 1 or more interfaces <-- channel never forms
apsd failure counts, AFTER sign-in only (14:59:04 -> 15:03:11)
2 APSBAAClientIdentityProvider failed to obtain a BAA cert
8 sepkey unable to generate key
2 Told not to connect after fetching server bag
11 Connected on 0 interfaces
0 Connected on 1 or more interfaces <-- still never forms
Most recent failure 15:02:11, i.e. ongoing at time of capture.
The post-sign-in error is identical to the pre-sign-in error, same codes:
sepkey] <sepk:* kid=0000000000000000>: (apsd) unable to generate key:
error e00002e2(-536870174)
APSBAAClientIdentityProvider failed to obtain a BAA cert, error:
Error Domain=com.apple.MobileActivation.ErrorDomain Code=-1
"Failed to create reference key."
(underlying: NSOSStatusErrorDomain Code=-25308 errSecInteractionNotAllowed)
Additional, non-MDM symptom worth noting
With the Apple Account signed in, System Settings reports
"Some iCloud Data Isn't Syncing".
Note this is an inference, not a proven link: iCloud sync depends on the same
APNs push channel, and that channel never forms. It is offered because it shows
the impact is not MDM-specific -- a first-party Apple service on a signed-in
account is also affected on the same guest.
Also observed: no MobileMeAccounts preference domain and no
com.apple.gs.appleid.auth keychain item, despite the UI showing the account as
signed in. Consistent with an account that cannot complete its service setup.