Fix the Corrupted MacOS Copy that cannot be used to install macOS:

If you try to install macOS on your Mac or Hackintosh, you receive an error message that reads: “This copy of macOS cannot be used to install macOS.”

You can try to install this macOS on your Mac or on your Hackintosh machine , and you get the following message: “This copy of the Installer macOS High Sierra application is corrupted and cannot be used to install macOS”. It does not matter, your key is not corrupted, you just need to be cunning to get around this problem.

The reason for this error? The date (and / or time) of your machine! In fact, on older versions of macOS, security certificates expire on a certain date, after which it is “impossible” to install the version in question. It seems that this error returns since the availability of the new version of macOS Catalina .

This error can appear on any version of macOS, be it Mojave, High Sierra, or a much older version like Mavericks or Lion.

To fix the problem, we will need only 2 steps:

  • Disconnect the computer from the internet
  • Change the date and time on the computer

Before you start, be sure to turn off your machine. Then be sure to disconnect your computer from the Internet network. Simply unplug the Ethernet cable if it is wired, or by disconnecting the Wi-Fi card (unplug a USB key, turn off a Wi-Fi card etc.).

Once the computer is disconnected from the Internet network, we will be able to modify the date to complete our installation. There are 2 steps for this. Either directly via the BIOS of your motherboard, or in the terminal via the installer of macOS itself. We will realize the 2nd solution for this tutorial.

Reboot on the USB stick that contains the macOS installer, but instead of selecting the installation, go to the Utilities section and choose the terminal.

Then type the following command, making sure to modify the date correctly in the following form:

date MMJJHHmmAA

Where M corresponds to the month, J to the day, H to the hour, m to the minutes and A to the year.

For the installation of Mojave for example, we will modify the date to return to 08/18/2019 at 2:00 p.m. (date when the last version of macOS available was Mojave). You will therefore have to enter the following command in the terminal:

Once the order is entered, the date will be changed. All you have to do is resume the installation normally.

Note : You will not have to reconnect the computer until the installation is complete, otherwise the date will update with the network, and the error will return.

If this tutorial helped you, feel free to share the article and tell me in the comments

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