How to fix signature errors when upgrading macOS

MacOS operating system after launch has brought extremely interesting experiences to users such as using Siri virtual assistant on the machine, upgrading Photo applications, . However during the process of upgrading the operating system macOS, it is very easy for you to encounter some errors leading to the installation failure. One of those errors is signature error when installing macOS.

This error may be due to the macOS installation process, your device automatically jumped to time 2010, while the latest version of macOS was released in 2016, causing an error when installing the operating system. . In the article below, we will guide you how to fix signature errors when installing macOS.

Note to readers, before reinstalling the operating system, back up all the necessary data on the device.

How to fix signature errors when upgrading macOS Picture 1

Step 1:

We launch the macOS operating system installer, then click Utilites to open the Terminal .

How to fix signature errors when upgrading macOS Picture 2

Step 2:

The Terminal window appears. Next, enter the date command in the interface window as shown below, to check the time being installed on the device.

How to fix signature errors when upgrading macOS Picture 3

Step 3:

In case the time is not correct compared to the current date, we correct the order as shown below. Accordingly, the order in Figure 0106140817 means the device is adjusted to January 6, 2017, 14:00 am PST time.

How to fix signature errors when upgrading macOS Picture 4

Step 4:

Finally, turn off Terminal to reinstall macOS on the device.

So we have fixed the signature error when installing and upgrading macOS operating system already. Just change the time back to the current date and time on the device and the error will not appear. Finally, proceed to upgrade macOS on the device again.

Refer to the following articles:

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

How to create a MacOS Sierra installed USB drive 10.12

Old Mac acceleration runs as fast as when you first bought it with these tips

I wish you all success!

Samuel Daniel

Update 25 May 2019

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