If Apple Mac freezes during shutdown, it means may be your Mac Pro desktop is affected by virus. And it could be caused by a variety of problems. Get some troubleshooting steps by accessing http://mac-technical-support.com website that can help you resolve this issue. Try to determine if one particular app is causing the problem, if one app always freezes when you shut down, then update it or reinstall. Perform a software update; update any software that you installed outside of the app store. Visit http://applecustomerservice.us to download and open Disk Utility, choose the main hard drive and verify Disk, if there is any problem in Disk then try to repair it. At last, backup and reinstall Mac OS X. If it does not solve your problem, please dial toll-free Mac help number for Apple Mac support.
External Link: 800-786-0581-Mac Won’t Start After Sierra Installation;Get Apple Support | http://bit.ly/2kAcvoX | https://goo.gl/58guL
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