After upgrading my Mac Book Pro to OS X El Capitan (v10.11.2), I can not access my Windows server to connect to server by SMB. When I connect to server “smb://server ip”, type the correct username & password, display error message ,
“There was a problem connecting to the server “server”. Check the server name or IP address, and then try again. If you continue to have problems, contact your system administrator. “
But in Yosemite, it work fine .
Is this a MAC EI Capitan bug?