macOS Tahoe 26.2: Lockdown Mode breaks Continuity Calling, disrupts Find My People sharing, and can hang iCloud sign-in/out

I’m seeing multiple, 100% reproducible failures tied to Lockdown Mode on macOS Tahoe 26.2 when used with an iPhone on iOS 26.2.

Devices / versions:

• Mac: MacBook Air 13” (M4, 2025) running macOS Tahoe 26.2

• iPhone: iPhone 16 Pro (MYML3LL/A) running iOS 26.2

Failure #1 — Continuity Calling breaks when Lockdown is enabled on macOS

Works (baseline): With Lockdown OFF on the Mac, Continuity Calling / Calls on Other Devices works (Mac can place/receive iPhone calls).

Breaks: Enable Lockdown Mode ON on the Mac (reboot required) → Continuity Calling breaks immediately.

Workaround: Disable Lockdown Mode on the Mac + reboot → calling works again immediately.

Repro steps:

1. iPhone: Settings → Phone → Calls on Other Devices → enable “Allow Calls on Other Devices” + enable the Mac

2. Confirm Mac calling works (place/receive call)

3. Mac: System Settings → Privacy & Security → Lockdown Mode → Enable → reboot

4. Try calling again from Mac → fails

5. Disable Lockdown Mode on Mac + reboot → works again

Failure #2 — Find My People sharing becomes inconsistent / stale under Lockdown + iCloud churn

During troubleshooting, Find My got into an inconsistent state:

• One device showed a person as “Last seen X minutes ago” while another device showed live location

• Fix was to remove the person from Find My People and re-add them (PITA)

• I also noticed Lockdown-related prompts during the sharing flow (blocking/limiting sharing behavior)

Failure #3 — iCloud sign-out / sign-in hangs while Lockdown is enabled

While Lockdown Mode was enabled, I could not reliably sign out and sign back into iCloud on both devices:

• iPhone: sign-out hung (“Signing out…” stuck)

• Mac: Apple Account sign-in appeared stuck/hung, and after reboot the Mac remained signed out

• Disabling Lockdown Mode on the Mac was the only way I could get sign-in working again

Summary

It appears there are at least three significant product failures here tied to Lockdown Mode in this environment:

1. Lockdown Mode on macOS breaks Continuity Calling

2. Find My People sharing can become stale/inconsistent and requires remove/re-add

3. iCloud sign-in/sign-out can hang and becomes unreliable under Lockdown

Question:

Is anyone else seeing these issues on Tahoe 26.2 + iOS 26.2? Any reliable workaround besides disabling Lockdown Mode (especially on macOS)?