Apple published a support article with solutions to a problem that blocks macOS devices from connecting to CIFS / SMBv1 network shares hosted on Windows servers when using NTLM user information.
MacOS users trying to access a CIFS or SMBv1 network sharing from a Windows device after installing a Windows update from June 11 will receive the following error:
The list of affected Windows platforms is quite long, with both affected client and server versions of Windows listed in the table below.
|Client  Server|
|Windows 10, version 1903||Windows Server, version 1903|
|Windows 10, version 1809||Windows Server, version 1809 / Windows Server 2019  Windows 10 Enterprise LTSC 2019||Windows Server, version 1803|
|Windows 10, version 1803||Windows Server, version 1709|
|Windows 10, version 1709||Windows Server 2016|
|Windows 10 , version 1703||Windows Server 2012 R2|
|Windows 10 Enterprise LTSC 2016||Windows Server 2012|
|Windows 10, version 1607||Windows Server 2008 R2 SP1|
|Windows 10 Enterprise LTSC 2015  Windows Server 2008 SP2|
|Wind ows 7 SP1|
Microsoft lists this known issue as resolved, with detailed solutions to be followed by Apple on its support website.
Apple's Solutions for Inaccessible SMBv1 Shares
"macOS Mojave and previously unable to use NTLM credentials to connect to CIFS or SMB1 shares on a server that has received Microsoft Windows Server updates June 11, 2019 or later, "Apple describes the issue.
"After entering your username and password, notice says there was a problem connecting to the server, and to check the server name or IP address and then try again."
Users who are sure that The NTLM credentials they used to log in to the network sharing can properly use one of the following solutions to connect: