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After updating to Sierra, Mac won't connect to ReadyNAS device

I have two Macs at home - an iMac, and a MacBook Pro. I also have a ReadyNAS device, which acts as a Time Machine for both.


I updated the iMac to macOS Sierra. The upgrade went without issue, no errors reported. However, once it was back up, I found that the iMac had issues authenticating to the ReadyNAS using AFP (and / or it would authenticate, then drop the connection), and also could not connect to the Time Machine service on the ReadyNAS device.


To be sure it was not the ReadyNAS, I went to my MBP - it's still running OS X 10.11, and is not showing any issues. AFP shares are accessible without issue, and Time Machine works as expected.


Did anything change with the AFP or Time Machine protocols in macOS Sierra, that might cause this?


The ReadyNAS Device is a ReadyNAS Pro 4, running 4.2.28 firmware, if that helps.


Thank you for your help!

iMac, macOS Sierra (10.12)

Posted on Sep 21, 2016 4:16 PM

Reply
45 replies

Jul 31, 2017 7:46 AM in response to Geoffrey Schaller

I have a slightly different issue but Synology tech support have just passed the buck straight back without making much effort at all.


Briefly, I have an iMac connected to a Synology NAS by ethernet, it sees the Synology NAS AND Time Machine works. I have a MacBook Pro that connects to the Synology NAS by WIFI - this works fine for read/write ing files BUT and its a very annoying BUT, Time Machine does not detect the NAS either by SMB or AFP.

Aug 25, 2017 9:34 AM in response to redtomato

Time Machine does still work with AFP mounts as long as the AFP server is compatible, therefore it does work with both the Time Capsule via AFP and a Mac Server.app server. It is likely that at some point in the future a new version of Server.app might completely stop providing AFP support but I do not expect this to happen soon. Similarly a new future version of macOS nee OS X might stop supporting AFP. Apple's Server.app already supports acting as a Time Machine server via SMB.


What has been a problem is various NAS devices running Netatalk which is the AFP software used by these NAS dvices and where the Netatalk version may be either out-of-date or if even it is the latest Netatalk version might not yet be compatible with whatever changes Apple have made.


I would not expect the Time Capsule to ever get SMB support for Time Machine backups. Rumours are that the Time Capsule is going to be discontinued.


NAS devices use SAMBA to provide SMB support and the SAMBA programmers are as I previously mentioned supposedly working on adding Time Machine support.

Sep 21, 2016 5:05 PM in response to Kappy

Do you have anything to back that statement up?


I know it looked like apple was going to move to smbx from afp starting with Mavericks, but after the dns resolver problems, in el capitan it looked like nfs, smb/cifs and afp were all living happily together.


Is the removal of afp in Sierra documented anywhere from Apple?


Really curious about this.

Sep 21, 2016 5:33 PM in response to Kappy

Given that Time Machine still works with my 10.11 MacBook, the NAS is working as intended. macOS Sierra changed something about how Time Machine worked.


I am not looking for Apple to fix it, so much as a confirmation, so that I can work with Netgear and give a better technical description to them, and help others understand what is going on.

Sep 22, 2016 2:21 PM in response to Geoffrey Schaller

Got always the same problems on 3 Machines with 2 totally different Backup targets.

So I have NO more a backup since I updated to Sierra.... *** 😟

targets

a) Linux /Netatalk based TimeMachine Server (over AFP)

b) Apple AirPort Extreme (of course AFP)

in both cases I found tons of such messages in the console log

AFP_VFS afpfs_vnop_ioctl: afpfs_FindForkRef failed -1

and a huge load of backupd (99%) and logd (40%)

Backup hangs always with the state "Preparing Backup ..."

After updating to Sierra, Mac won't connect to ReadyNAS device

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