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Back to my Mac stops working after macOS Sierra...

Hi,

The MacBook Pro (early 2015) I use for work recently experienced a failure with one of its memory module. It was brought to an Apple STore, the modul promptly replace and it’s working fine again. Data was preserved, but the operating system was updated from El Capitan to macOS Sierra. Since that upgrade, I can’t use Back to my Mac with an older MacBook Pro I keep at home (a mid-2009 model stuck with E Capitan). Is it because if the operating system discrptancy, or is there something I can do. Worth noting: it has been working flawlessly up until the upgrade and I was using the share screen functionality everyday.

Thank.

More details. On the same network, at home, I can use Backto my Mac one way only: using my old, personal MacBook Pro (running El Capitan) to remotely access the Sierra MacBook Pro (when I have both computer using the same wi-fi, at home). But I still can’t do it on the Sierry computer: I can check the Back to my Mac box, but the El Capitan computer does not appear in the side column of the Finder on the Sierra computer.

Well, that’s embarassing: I guess the Finder options were reset by the update. Turned out all I needed to do was to click “show” beside the “Shared” section in the Finder window. And there was the other computer. Back to my Mac works as expected.

This support article may help.  Especially the part about the Back to my Mac keys.  Also, check your firewall settings on the Mac that was recently updated to Sierra.

Get help using Back to My Mac - Apple Support

The very first item of this support article states “Update your Mac to the latest version of macOS”. As I explained, one of my computer is still running El Capitan and will be running it for the rest of its life since it cannot be upgraded to Sierra (to old a model). Hence the question regarding the possibility of running Back to my Mac on computers running different OS system.

That should be ok.  You can use Back to My Mac between different OS versions.  I would focus on the other suggestions.

Thanks. In that case, I can report the followings:

1) Both computer are signed in to my iCloud account: if I log in online to iCloud, I can see both;

2) Haven’t touched configuration on the El Capitan Macbook Pro, except for checking/unchecking the Back to my Mac box;

2) On Sierra, updating My Mac keys didn’t work (I followed the steps twice).

3) On Sierra, screen sharing and file sharings are checked, access is allowed only to admins

4) Firewall is on, “Block all incoming” is off, “Automatically allow built-in” is on, “Automatically allow downloaed” is on, stealth mode is off.

Seems like you have everything setup correctly.  The only other thing I can suggest is to reboot your router/modem.  I recently had a problem with Back to My Mac and after troubleshooting for some time, it turned out to just be a reboot of my Airport Extreme that fixed it.

You can read this article : macOS Sierra: If Back to My Mac doesn’t work

Thanks, I can reboot the modem at home, but that’s not an option at work. Also I’m not using an AirPort Base Station or AirPort Time Capsule.

More details. On the same network, at home, I can use Backto my Mac one way only: using my old, personal MacBook Pro (running El Capitan) to remotely access the Sierra MacBook Pro (when I have both computer using the same wi-fi, at home). But I still can’t do it on the Sierry computer: I can check the Back to my Mac box, but the El Capitan computer does not appear in the side column of the Finder on the Sierra computer.

Well, that’s embarassing: I guess the Finder options were reset by the update. Turned out all I needed to do was to click “show” beside the “Shared” section in the Finder window. And there was the other computer. Back to my Mac works as expected.

Great!  Funny how it usually ends up being something simple. Glad it's working...

After many frustrating hours trying to find a solution, this works for me on Sierra 10.12.6:

Assuming you get the remote Mac showing up in Finder ... when you Connect As select the Registered User option, then, login using the name of the user's folder on the remote Mac ...

On the remote Mac this is the name associated with the Home icon in Finder, and is the same as the user's user folder name - i.e. username in Macintosh HD/Users/username/...

My setup used 2 iMacs with non-Apple routers (both with UPnP enabled), and both iMacs with built-in firewall on.

For reasons unknown one iMac had named my user folder "joe" while the other named it "joebloggs" while my username was "Joe Bloggs".

Hence to access iMac1 from iMac2 I needed to Connect As joebloggs while to access iMac2 from iMac1 I needed to Connect As joe– in both cases using the password for my Joe Bloggs account on the remote iMac.

Curiously, screen sharing worked by logging on as Joe Bloggs.

Have since noticed how irritatingly inconsistent OSX treats user names!

最後更新：2017-09-08 11:30:44

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