Mac time not updating
If you're having problems downloading the update via the Mac App Store, you can use Apple's website instead.
For example, you can find the mac OS Sierra 10.12.4 update here.
It's one reason why it's recommended that you back up your Mac before you install new software.
Before you conclude that your Mac has frozen during the installation, you need to be aware of the following. You may be confronted by what looks like a frozen update, but if you leave it for a few hours it could finally get to the end of its task.
You might find that things are quicker if you move from a Wi Fi to a wired connection.
Read more: How to fix Wi Fi problems on Mac You may be able to fixing a stuck update by going to the Mac App Store, finding the software you are downloading, and pressing Option/Alt.
But you can also set up a time server so your clock will be set to your office's time, or maybe your college's time (many colleges have their own time servers).
The Mac might have been stuck on 20 minutes remaining for the past two hours, but this doesn't necessarily mean it's not busy trying to install the software. This brings up additional information and more details about the amount of time still remaining for the install.To change the time zone on Linux, make sure /etc/localtime is symlinked to the correct time zone from /usr/share/zoneinfo.Time synchronization is also available for almost any other platform and operating system.There are a few reasons why the process might be interrupted.Perhaps there's been a power cut; maybe there isn't adequate space available on your Mac (we always recommend that you don't install with less than 10GB free or your Mac may struggle with the installation); maybe there are other problems with your Mac - it's worth running Disk Utility (you'll find it in Applications Utilities) prior to updating just in case.
Sometimes updating the software on a Mac can take a Very. Sometimes it's worth leaving the Mac overnight to finish the job it's started. Remember, the progress bar you see during installation is just a best guess at how long it will take.