How to fix common errors when upgrading to macOS Sierra

When leveling up a new operating system and then having a few errors is inevitable. Similar to the case when you upgrade macOS Sierra operating system 10.12, Mac will encounter some problems such as not opening the app to use, report an error Failed to Download when updating, not using WiFi, . In this article, we will summarize the most common errors during macOS Sierra upgrade.

1. An Error Has Occurred Error or Failed to Download when updating:

For those who conduct the upgrade of a new operating system on a Mac, this message will be easily overcome. You only need to delete the macOS Sierra installer on your Mac.

Go to Launchpad and then delete the Install macOS Sierra file , then reload the file to proceed with the upgrade again.

2. Error Downloaded on the App Store:

When you go to the App Store, you will see the latest update, Downloaded notice, even though the device has not been downloaded yet. Thus, your device has been installed with beta or GM build.

First, delete the entire macOS Sierra file from the computer and then return to the App Store to reload the official new version update .

3. This copy of the Install error macOS Sierra.app application is damaged, and can't be used to install macOS:

When installing the new macOS Sierra operating system if the above error message appears, the software download process will be problematic. Go to Launchpad and delete the Install macOS Sierra file , then reload and upgrade from scratch .

4. Wi-Fi has a problem:

After the Mac gets the latest version of macOS Sierra, there will be problems with Wi-Fi, such as inaccessible or slow transfer speeds, affecting our work.

First, check if the router is working properly. After that, perform the Wi-Fi deletion steps as follows: First open the Finder on the device. In the menu above select Go and go to Libarary . Next go to the / Preferences / SystemConfiguration / folder and delete the following files:

1. com.apple.airport.preferences.plist
2. com.apple.network.identification.plist
3. com.apple.wifi.message-tracer.plist
4. NetworkInterfaces.plist
5. preferences.plist

Then restart the computer and router to check the results.

5. File to install macOS Sierra crash:

To handle this situation, users can try the following remedies:

1. Disable or uninstall existing antivirus applications.
2. Check the network connection in use.
3. Turn off the phone and turn it back on when the sound signal starts, press the Shift key, and when the Apple logo appears, release it. So, you have installed Safe Mode safe on macOS Sierra. Finally download and reinstall the operating system.

6. Memory missing error when installing:

Your Mac does not install many other applications or programs, but when you upgrade the operating system, you get a message that the memory is missing. This happens to a lot of Macs when updating.

Please check back on your computer and delete the files or applications you do not need, make sure you have 8 GB of free memory. If you can not fix it, you can try to bring the computer to Safe Mode as instructed at the 5th error.

7. Logitech mouse error cannot be used:

When updating to macOS Sierra, Logictech mouse is not compatible with the software version, making it difficult to use, jump buttons, jerks or lag.

This is due to an incompatibility error between macOS Sierra and Logictech's Control Center application. The only fix is ​​to wait for the latest Logitech update.

8. Cannot use the Mac after updating:

After the update, there will be a machine that is unable to boot for use. The only remedy is to reset NVRAM and PRAM .

First, reset the Mac , press and hold the Cmd + Option + P + R key combination . When the sound signal starts for the second time, release and wait for the device to restart.

9. Error message Damaged and Can't Be Opened when opening the application:

If you upgrade to the latest Mac version, when opening the application and the above error message appears, the application may not update to the latest version. If the situation still occurs, try uninstalling and reinstalling the application.

In case of no results try clearing the application cache:

Step 1:

First open the Finder , click Go> Go To Folder at the menubar above.

Step 2:

Enter the textbox in the keyword ~ / Library / Caches . Next delete files from all folders. You do the steps above but with Library / Caches .

The final solution is to reset the PRAM with the same method as the 8th error, or open the application and hold down the Cmd + Option key combination.

10. iCloud error and Authentication:

After updating to macOS Sierra, there may be some error messages with iCloud: continuous notification window for installing Storage Optimization, iCloud Documents and Desktop.

The following steps can be taken to overcome:

Select the Apple logo icon in the left corner of the screen and go to the System Preferences folder . Click on iCloud and select Sign out . Then restart your computer and go to iCloud Preferences then login to iCloud again,

These are the basic errors and most common when we update to the latest version of macOS Sierra. Depending on the situation, your Mac is having to choose the best way to fix it.

Refer to the following articles:

1. Instructions on how to install macOS Sierra (clean install) 10.12 on Mac

1. How to create a MacOS Sierra installed USB drive 10.12

1. Useful tips for macOS 10.12 Sierra

I wish you all success!