Can't connect to the Apple Software Update server.

Hello Snowvdo,

Thanks for using Apple Support Communities.

To troubleshoot this issue if you cannot connect to the Software Update server, please follow the information outlined below.

If you can't connect to the Software Update server

If you're using your iPhone as an Instant Hotspot, OS X doesn't check for updates automatically. If you need to install an update while you're using your cellular data connection, open the Updates pane of the Mac App Store to manually check for and download updates.

If you are using your Mac at a business or school, ask your network administrator if you're using a proxy server. Software Update uses HTTPS to create a secure connection to Apple's Software Update servers. Make sure you have a working Internet connection by opening http://www.apple.com in Safari. Your administrator can configure a proxy server to allow allow a secure connection to Apple's Software Update server if needed.

Update OS X and App Store apps on your Mac - Apple Support

Take care,

Alex H.