Q: Sierra / Issue with Synology network drives

Apple recommends against the use of networked drives.

are you connect to the synology over wifi or ethernet?

If wifi, can you try plugging into ethernet, and turn off the wifi. Do you still have the issue?

For me. I can connect but just a few click, finder is not response everytime

Finder is not response  every time I try to access NAS after just a few click into folder.

Wait for infinity many minutes. After terminate finder process It's get back to work but don't touch NAS volume it's will not response suddenly.

When Finder is not response. I mean I can not use any other volume also until restart the finder. And in that situation I cannot reboot the machine except hard reset.

Just tested mine. Works fine. Synology should be coming out with a macOS 10.12 update soon, if not already.

AFP connections fail as you say. it works over SMB. I assume synology will issue a fix (hopefully soon)

PANIC !! I have the same problem Synology NAS hangs with new OS Sierra ! What to do ? We have also the latest release installed.

What to do? Next time try investigating compatibility before blindly upgrading to a major release. Use a test system to find any problems first. Now all you can do is hope that Synology comes up with a solution.

Either follow Ikrupp's sage advise or follow Apple's recommendation of not using NAS because it is not compatible with Mac OS X no matter what the vendors of NAS might say.

You know, I don't think that your advice to not use NAS is helpful and is rather condescending. I have been using a Synology NAS for Time Machine backups and also for file storage for some time now. I have an iMac, 2 x Macbook Pro, 1 x Windows 7 and Raspberry PI connected and using the NAS perfectly well. The 3 Macs use Time machine both wired and wireless. Admittedly third party device manufacturers should be testing with a new OS X release but for Apple to remove interfaces for legacy support without warning is, quite frankly, ridiculous. They, and Creative Labs, did the same thing with the USB support for audio interfaces at the release of El Capitan. Now, Creative support appear to have ignored completely the requests for updates to be compatible. I had to purchase a new Steinberg Audio Interface to get decent sound fro my iMac and am keeping my fingers crossed that it will still work with Sierra when I upgrade from El Capitan. I am a recent (well, 6 years ago and I'm 68 now) convert to Apple from Windows with absolutely no regrets. Also iPhone and iPad. The whole experience is truly much better than Windows but I'm not one of those Apple users that say that Windows is worthless. Just to mention Ikrupp's sage advice, how many of us have spare Mac to use as a test system and where would you look to check compatibility? Anyway, enough whingeing, I'm off to do a 2nd copy of a backup before upgrading. Wish me luck.

Please cite.

I want to know where that Apple recommendation comes from.

I experience the same problem with Preview while saving.

I got the same problem with Numbers, too. (see here)

I think it has something to do with the file versioning (which is not supported on shared drives, see here