Step 3: Once you set the date and time correctly, click Save to confirm the changes. Then enter the correct date and time manually. Step 2: In the next window, uncheck the Set date and time automatically option. Step 1: Open the Apple menu and select System Preferences. In this case, to get rid of this annoying issue and complete the installation successfully, you have to correct the date and time. Once the date and time on your Mac are set improperly, you may fail to continue the installation and receive the error message “an error occurred while preparing the installation. The right date and time are important when the installer tries to establish a connection with the Apple servers for the macOS installation. If the error persists after restarting your computer, you should continue with other solutions. By doing this, you can repair plenty of temporary bugs and glitches on your Mac. The simplest and quickest way to fix the “an error occurred while preparing the installation try running this application again” issue is to restart your Mac. Now that we learn the possible reasons for this issue, let’s keep reading to find out the feasible methods for fixing it. Besides, temporary glitches and corrupted NVRAM data are also the reasons for the “Mac an error occurred while preparing the installation” issue. The above error is mainly caused by the incorrect date & time or a corrupted installer. For instance, you are likely to fail to start the macOS installation randomly due to the error message: an error occurred while preparing the installation. On This Page :ĭuring the process of installing or updating the macOS, you may get stuck in certain issues. ![]() Do you know how to solve it? Well, in this post, MiniTool Partition Wizard introduces several effective solutions to this issue. When you are attempting to install the macOS, it’s possible to encounter the “ an error occurred while preparing the installation” issue.
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