I have a Windows 7 Pro PC and want to share its drives so my Mac with Sierra installed can see it.

The PC is named "PC", it's on a workgroup called "WORKGROUP" and the only user on it is called "Tim" and this user has never had a password created for it. The Windows username is therefore PC\Tim. I checked the Guest account also and it's enabled now.

I went to the root of the drive I want to share and set the Everyone user to have FULL CONTROL. I set up advanced sharing so that the drive was shared from root and has "everyone" as "full control". This is how I want it.

On my Mac I want to connect to it via its IP address. I open the "Connect to Server" box and type in smb://

This prompts with the "connect as" box but I can't get past it. I've tried selecting Guest which goes to the "problem connecting" screen. I've tried the names tim, Tim, pc\tim, PC\Tim and none of these work.

I tried setting up a new account on the Windows 7 PC, called "MAC". It has a password, which is MAC. I added the user MAC as full control on the root of the drive I want to share. I added the user MAC permission in the advanced sharing screen and ensured that it had full permissions.

The prompt still refuses to authenticate the users.

Note: I also tried connecting to cifs://

So. Is Sierra Mac just no longer able to connect to Windows computers?


I've noticed this error message in the console during the time it's tryign to authenticate. I've also confirmed that YOSEMITE will connect just fine: This only affects SIERRA.

RPC to srvsrvc gave error 0x16c9a034

Googling this leads to a rather unhelpful Apple article.

  • Maybe try this - apple.stackexchange.com/questions/152900/…
    – Tetsujin
    Jul 15, 2017 at 10:51
  • Nope. For me this has FIXED Yosemite connecting to Windows 7, but Sierra is still unable to connect.
    – frumbert
    Jul 16, 2017 at 0:31
  • Here the Win7 share works right out of the box - with nothing (or the defaults) set in Win7's Local Security Policy > ...> "Network security: LAN manager authentication level"
    – klanomath
    Jul 16, 2017 at 19:04
  • Upgraded Sierra to 10.12.6. One of the fixes was "connecting to smb shares". Has had no effect - still broken. :-/
    – frumbert
    Aug 1, 2017 at 11:51


You must log in to answer this question.

Browse other questions tagged .