Universal Clipboard iPhone to Mac stops working until iPhone restart (FB24740548)

Community Apple Developers
danwidj OP
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Universal Clipboard from iPhone to Mac works after an iPhone restart, then silently stops after a while. Mac to iPhone and Mac to Mac keep working. Only restarting the iPhone fixes it; toggling Bluetooth or Handoff does not.

What the Mac's unified log shows while broken (useractivityd + sharingd):

  • Mac to Mac (working): Received Ad ... CopyPasteKey = 1, then [PBOARD] Received pboard available advertisement, then Requesting complete: 1713 bytes, error: (null).
  • iPhone to Mac (broken): zero Received Ad and zero pboard advertisements from the iPhone, even while copying every few seconds with the phone next to the Mac. No errors.
  • The Mac still recognises the iPhone as a paired own-account device (Paired yes, identity resolved, distance Immediate), so pairing and receiving are fine.

So the iPhone appears to stop broadcasting Handoff advertisements entirely, and the stuck state survives Bluetooth and Handoff toggles.

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Universal Clipboard iPhone to Mac stops working until iPhone restart (FB24740548)
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