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#Install os x el capitan target disk install
#Install os x el capitan target disk download
#Install os x el capitan target disk mac

To find out the date when the installer was downloaded, use the stat Install OS X El Capitan.app command.

Now, you will have to change the date.

Once the terminal window opens up, navigate to where the installer is by using the cd command.

Now, on the macOS Utilities screen, click on the Utilities option at the top and then from the drop-down menu, select Terminal.

Once you see the Apple logo on the screen, release the keys.

Power it back on but immediately press and hold the Command + R keys.

#Install os x el capitan target disk mac

First of all, power off your Mac device.To do this, just follow the steps down below: In case you are not able to boot into macOS, you can still change the date through a Terminal window from the macOS Recovery menu. Try installing the OS again and you should be good to go.Make sure that the Set date and time automatically box is unchecked.If you do not remember, you can go to where the installer is located and just check its details. There, change the date and time to the time you downloaded the installer.To do this, open up the System Preferences through the Apple menu.If you are able to boot into macOS, you can easily change the date and time through the System Preferences window.Once you have made sure that you do not have an active connection, follow the steps given down below: This is because if you are connected to the internet, the date and time will just revert and you won’t be able to achieve what you want to. It is important to note that when you change your date, please make sure that your Mac device does not have an active internet connection. We will go through both of them, so just follow through. In case you can’t, don’t worry as you can still achieve through the macOS Recovery menu. First, if you are able to boot into your current version of macOS, you can just go to the System Preferences and do it from there. Now, there are two ways that you can do this. That way, the certificate will still be valid and you will be able to complete the installation. As it turns out, you will have to change your date and time to the time when you actually downloaded the installer. The first thing that you should do when you face the error message is to change your date and time. Method 1: Change Date and Time Through Terminal

With the causes of the error message now out of the way, we can get into the different methods that you can implement to install OS X El Capitan successfully. As a result, you will have you redownload the installer to fix this issue.

#Install os x el capitan target disk download

In case the download process was interrupted or interfered with, it may result in the said error message.

Corrupted Installer - Lastly, the reason why this error message may occur could be a corrupted installer as suggested by the error message itself.

This can be easily fixed by just changing the current date of your Mac device. As a result, the certificates are expired and you are shown the mentioned error message. This happens when you use the installer at quite a later date from the time when you actually downloaded it.

Expired Digital Certificate - The main reason why this error message appears is when the digital certificate associated with the installer expires.

However, before we get into that, let us go through the causes. The solution to this issue is pretty simple and can be easily implemented. Users have tried downloading the installer again but in most cases, it does not work out either. We will be discussing the causes in detail down below.

There is another major reason why this error message can occur and that is the digital signature that comes with the installer. While that can be the case in some scenarios, it does not always hold true. This Copy of the Install OS X El Capitan Application Can’t be Verified Error Message The error message suggests that this copy of the installer may be corrupted due to which the issue is occurring. This error message occurs when your Mac device reboots in order to begin the installation phase. One of the errors that users face while upgrading to the OS X El Capitan is the “ This copy of the Install OS X El Capitan application can’t be verified“. However, when the installation does not go as planned, it can become tedious especially if you are aware of what the error message means. Installing a new version of the macOS operating system is always exciting and intriguing.