Category Archives: Macos Sierra

How to fix if iTunes and AppStore not working

iTunes and App Store may not work after upgrade to the new MacOS Sierra. You may face “Cannot connect” or “Cannot connect to the App Store. An internet connection is required”,… How to fix?

The following solutions will fix if iTunes and Apple store is not working in MacOS Sierra

  1. Correct Time Zone: System Preferences > Date & Time > Make sure “Set date and time automatically:” is checked [If you are living in North America, you must choose “Apple Americas/U.S. (”]. And then make the date and time correct.
  2. Fix Invalid or incorrect Certificates: From Finder window > Choose “Go to Folder” from the top menu > Enter “/var/db/crls/” in the Go window > Click on “Go” button > delete completely the following files: crlcache.db and ocspcache.db

Fix the “App can’t be opened because it is from an unidentified developer” problem under MacOS Sierra

“App can’t be opened because it is from an unidentified developer” is a common error you will face obviously. The another error is “App is damaged and can’t be opened”.

How to fix these errors in MacOS Sierra?

Here below is “CleanMyMac 3” can’t be opened because it is from an unidentified developer error


From Sierra desktop, Apple  menu > System Preferences > Security & Privacy > Select “General” tab > check on “Anywhere” under  “Allow applications downloaded from”, you then can launch any app from any location or developer.

MacOS Sierra update paused and won’t download [Fixed]

Too many user can not download completely the new MacOS Sierra. MacOS Sierra update is just paused, and seems not to be downloaded further.


  • End (Close) the App Store app completely.
  • Open Terminal (Found in Applications/Utilities/), then Enter the following command line:

defaults write ShowDebugMenu -bool true

  • Open App Store app again, then you have in the menu-item “Debug” – open it – and open “Show Download Folder”
  • Remove all all files and folders in the folder “”
  • End App Store app again, then restart your Mac
  • Launch App Store then attempt to repeat the download


Can not unlock MacOS Sierra using Apple Watch [Fixed]

After upgrade to MacOS Sierra, Unlock with Apple Watch may Not Working. How to fix?

It is so convenient because now we are able to use Apple Watch to unlock Mac OS including the newest Sierra. If this function does not work? How to solve out the problem?

  • Firstly, make sure that you know how to use Apple Watch to unlock your Mac in macOS Sierra in a right way. This guide would be helpful.
  • If you get the configurations done correctly, and it does not work, just simple restart your Mac, iPhone and Apple Watch, then attempt to do again to see the positive result.