Unlocking your mac not supported with your apple watch lỗi năm 2024

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I updated my Macbook pro (2019) to Big Sur, 11.0.1, and have since not been able to unlock my Mac with my Apple Watch series 5. I keep receiving the message "Your Apple Watch must be signed in to iCloud to allow it to unlock your Mac. You can sign in using the Apple Watch app on your iPhone." Even though I am signed into iCloud on both devices. I have tried disconnecting the watch from my account and re-pairing it to no avail. My watch is running watchOS 7.1 and my iPhone is running iOS 14.2.

MacBook Pro 13″, macOS 11.0

Posted on Nov 16, 2020 6:33 AM

Posted on Nov 20, 2020 10:30 AM

This is getting to be absolutely ridiculous. Every single time there has been an update to Big Sur, my watch loses its connection to my Mac. The best fix I have found is to sign out of icloud then sign back in, but what a complete pain it is to have to do it so repeatedly. I turned off automatic updates going forward, so as to avoid having to deal with it again until it is no longer a repeated issue.

Recently bought an iPhone 8 Pro and Apple Watch Series 8 to compliment my M1 Macbook Pro. Try as I might, I am unable to select the checkbox under Security & Privacy labeled "Use your Apple Watch to unlock apps and your Mac". My iPhone is unlocked as is my iPhone. The error reads:

"Your Mac was unable to communicate with your Apple Watch."

This previously worked on the Apple Watch Series 6 with the same Macbook Pro. I have tried every troubleshooting step I can find (and there are many) including:

• Deleting "Auto Unlock" and "AutoUnlock" entries under Keychain Manager
• Resetting bluetooth/wifi on mac and iPhone
• Resetting Handoff
• Restoring AppleWatch from backup and new
• Resetting iCloud Password
• Signing in/out iCloud from Mac

At this point I am at a loss. During all this troubleshooting I somehow managed to get the checkbox to stick once although I haven't been able to do so since. Even then, the unlock feature didn't work -- it spun and eventually timed out which is the only reason I unselected it in the first place.

Is anyone else seeing this? I realize this feature hasn't exactly been rock solid from the start judging by the posts dating back years but the fact that I had it working once with my old watch tells me there is hope. I could only find one other "recent" post from this guy who reported the same error, "Watch missing LTK for Mac" with a Series 8:

"Watch missing LTK for Mac"

Console logs read:

Watch missing LTK for Mac

Error in session created response: 125

Pairing lock session notifying delegate with error: Error Domain=SFAutoUnlockErrorDomain Code=125 "Your Mac was unable to communicate with your Apple Watch." UserInfo={SFAutoUnlockManagerErrorBody=Make sure your Apple Watch is unlocked and on wrist, and your iPhone is unlocked., NSLocalizedDescription=Your Mac was unable to communicate with your Apple Watch., SFAutoUnlockManagerErrorTitle=Your Mac was unable to communicate with your Apple Watch.}

Then I get an error popup saying Could not communicate with Apple Watch. Make sure the watch is unlocked. Which of course it is.

I have two iMacs which it works fine. My 2011 MacBook Pro doesn't have the option so its not an issue

I have Watch 6

Iphone 11 pro max

New MacBook Pro 2021 14". M1Pro 10 core CPU 8 Core GPU. 16 GBs Ram. 1 TB SSD

Im at a loss what try try next. I wished the error it generates would elaborate more on where it failed.

My Mac is an iMac Retina 27 inch 2020 running Monterey 12.2.1. My watch was opening it perfectly fine until I updated the watch OS to 9.2. I have been through the steps in the Apple Support list - nothing works.

Thank you,

David

Hi David East,

Welcome to the Apple (user-to-user) Community.

Wondering which Mac model you are using, and which MacOS version is installed.

ie: We can not tell if there is an incompatibility issue, or not.

This is the up-to-date Apple Support article on the issue:

How to: Unlock your Mac with your Apple Watch - Apple Support

All the best :-)

Thank you for your reply, and added info., David.

The below should not be necessary, as you have used auto-unlock previously:

Yet in the circumstances, wondering if you also checked your Mac for Auto Unlock :

Eg:

says:

"press and hold the Option key while choosing Apple menu > System Information. Select Wi-Fi in the sidebar of System Information.

On the right side, look for ”Auto Unlock: Supported.”

Thank you David,

Re: my iMac tends to switch to 5G sometimes

So, seems anytime your Mac had switched to 5G then Watch was unable to auto-unlock.

Apple support's info. on wi-fi settings for Mac Monterey may be useful:

Change Wi-Fi settings in Network preferences on Mac – Apple Support

Re: I don't know why that changed

You might want to reach out to the Apple Watch Support Team.

There is a "Get Support" link (scroll to the very bottom) on their webpage (link below)

Apple Watch - Official Apple Support

And /or

You may want to send feedback to Apple, to reach the software engineers.

They will likely not reply, yet your feedback will reach those who can make changes.

If others are also experiencing this issue, there may be changes in a future update by those working behind-the-scenes.

Feedback - Watch - Apple

Thanks for trying, but no. My router provides two

Wake On Wireless: Supported

AirDrop: Supported

AirDrop Channel: 149

Auto Unlock: Supported

Status: Connected

Current Network Information:

pluto_5G:

PHY Mode: 802.11ac

Channel: 149

Country Code: SG

Network Type: Infrastructure

Security: WPA2 Personal

Still can't get them to talk to each other...

Sorry - I didn't finish the sentence - my router provides two WiFi networks for some reason. My mac and iPhone can connect to either of them (I call them Pluto and Pluto 5G) but the watch will only see Pluto. I have made sure that all devices are using Pluto, but my iMac tends to switch to 5G sometimes.

But no. This is not the case. Sometimes it switches to the 5G by itself, but right now all my devices are set to Pluto and auto unlock is not working. It used to work fine like this, but not any more... I know how to set the correct wireless, but the watch only recognises one of the 2. I don't think the 5G actually is 5G - as far as I can tell it is just what the router calls it.

If you haven't already:

There's another Mac setting that may be worth checking:

System Preferences > Users & Groups >

Choose "Login-in Options" in the left sidebar, at the bottom.

Could the "Automatic login" there have been accidentally turned off (or have returned to a default off).

Well that discussion thread was more about the feature not working when it was switched on. But I can't switch it on. I used to be able to but now I can't communicate with the watch.

But also I am not sure I want to have automatic login enabled because that means anyone can start up my mac and get in without entering a password. I have never had this enabled in the past. And in the past I could open my mac with my watch. But what is different from before on the iMac is that previously when I restarted, I would see my name already there. I just had to enter a password. That is what I want. But now I have to enter both name and password. I don't know why that changed.

There's a discussion thread from a few months ago, trouble-shooting this issue.

May be there is something there we are not considering:

Unlock Mac with Apple Watch not working - Apple Community

I appreciate your patience. But alas no. It was on already. I toggled it off and on again but to no avail. I will try restarting (for the 100th time) but I doubt it will make any difference.