A computer problem starting right after a Windows or macOS update, a new peripheral or a software install should be checked against that specific change before a factory reset. For Universal Control between Mac and iPad, first place devices nearby, confirm the same Apple Account and test without VPN/hotspot.
What this covers
- Universal Control between Mac and iPad with this exact failure state
- Diagnosis across device/software eligibility versus account, proximity, Bluetooth, Wi-Fi and display arrangement
What it does not cover
Try in this order
0 of 4 completedCapture the exact failure state
ReversibleNote the exact update version or newly installed software, and confirm the prior working state. Expected behavior: move pointer and keyboard between supported nearby signed-in devices.
Isolate the component boundary
ReversiblePlace devices nearby, confirm the same Apple Account and test without VPN/hotspot. Uninstall the new software or roll back the update in a controlled test, where the OS supports it. Boundary to separate: device/software eligibility versus account, proximity, Bluetooth, Wi-Fi and display arrangement.
Correct only the proven cause
ReversibleUpdate and re-add the nearby display arrangement. Apply the vendor's fix for the update, or reconfigure the setting the new software changed.
Verify and stop safely
ReversibleConfirm stable operation with the update or new software present for one full session. Do not reset devices for an unsupported model or managed-account restriction.
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