Recently my sister asked me to reinstall the macOS High Sierra on her iMac because it stopped working correctly. I thought that it would be easy to do but I was mistaken. I successfully installed the macOS Mountain Lion (when using the NetBoot it automatically selects the version of macOS with which the iMac was shipped with). But then I was facing multiple issues trying to update macOS from Mountain Lion to High Sierra via the Mac App Store.

After downloading a copy of macOS High Sierra from the Mac App Store, I started installing the update. The Mac rebooted, and it seemed that everything was going well, but it was not. The progress bar did not move at all, or moved very slowly. I waited a few hours…

I began to figure out what was going on and found out the following. Attempting to download macOS High Sierra from the Mac App Store I found that a small 19 MB version of the “Install macOS High Sierra.app” file downloads to the “Applications” folder, rather than the complete 5.2 GB installer file. That’s the problem.

The tiny 19 MB incomplete installer requires an internet connection during usage to download the rest of the High Sierra update files. Additionally, it does not allow me to create a macOS High Sierra USB installer drive for use on multiple computers.

I’ve found a new workaround, and in this tutorial, I’ll show you how to download the complete “Install macOS High Sierra.app” file from Apple server using the “macOS High Sierra Patcher” app instead of via the Mac App Store.

MacOS Catalina, macOS Mojave, or macOS High Sierra Installers for each of these macOS versions download directly to your Applications folder as an app named Install macOS Catalina, Install macOS Mojave, or Install macOS High Sierra. If the installer opens after downloading, quit it without continuing installation. If you are a Mac users, so you can download the macOS High Sierra 10.13 from App store but if you are PC user then you’ve got the chance to do it from the guide here. In our previous article, we downloaded the macOS High Sierra VMware Image. If it checks out ok open System Preferences Users & Groups Login Items, if there are any third party apps set to start at login highlight them and click on the minus button to remove them. Download this, Download macOS High Sierra 10.13.6 Combo Update. Once downloaded double-click to install. See if that completes.

About the app

In this workaround, we’re going to use the macOS High Sierra Patcher app from the dosdude1.com. This app is intended for those with unsupported Macs and Hackintosh users, but any Mac user can use the app to be able to download the complete macOS Mojave installer file from Apple server. For our purposes in this particular walkthrough, we will use the app only to download the complete installer file.

Note! This method relies on a third party app from an unverified third party source. Convert photos using photos app mac. If you are not comfortable with using unvetted and unverified software, do not follow this process.

Let’s begin

Downloading the complete “Install macOS High Sierra.app” file from Apple server using the “macOS High Sierra Patcher” app is a really easy process. Now, step by step guide.

Does deleting photos on photo app mac work. It is really proven now that there is no real work around for this bug.

Go to the official website of the “macOS High Sierra Patcher” app here and download the app.

Launch the “macOS High Sierra Patcher” app.

Note! By default, macOS preventing apps from unidentified developers or sources from being launched. So you most likely will get an alert message that says: “macOS High Sierra Patcher.app can’t be opened because it is from an unidentified developer”. To allow just one specific app to run do the following:

Hold down the Control key and click the app icon. From the contextual menu choose Open.
A popup will appear asking you to confirm this action. Click the Open button.

Ignore everything about patching, instead pull down the “Tools” menu and choose “Download macOS High Sierra…”.

Mac Os X Sierra

Confirm that you want to download the “Install macOS High Sierra.app” file, and then point it to a location to save on the hard drive.

Close the “macOS High Sierra Patcher” app when the download is complete and locate the “Install macOS High Sierra.app” file you downloaded.

Conclusion

That’s it, you’re done. Now you have the complete “Install macOS High Sierra.app” file downloaded. So simple isn’t it?

Remove Mac Os High Sierra

You can confirm that you have the complete “Install macOS High Sierra.app” file by getting info on the file. For this simply select the file and click the Spacebar key (or right-click on the file and choose “Get Info”). The complete installer should be around 5.2 GB rather than the tiny 19 MB incomplete installer that requires additional downloads.

Note! Remember, the “Install macOS High Sierra.app” file deletes itself automatically after macOS High Sierra has successfully installed. Therefore, you may want to make a backup by having previously copied it to external storage.

Let me know in the comments section if you know another way to download the complete “Install macOS High Sierra.app” file rather than the tiny incomplete installer.

I hope this article has helped you learn how to downloaded the complete “Install macOS High Sierra.app” file from Apple server. If this article helped you then please leave a comment

Thanks for reading!

Arthur is a designer and full stack software engineer. He is the founder of Space X-Chimp and the blog My Cyber Universe. His personal website can be found at arthurgareginyan.com.

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Your Mac doesn’t work well after you’ve installed macOS High Sierra? Or something went wrong during the installation? One of the easiest ways to fix such issues is reinstalling the operating system. Don’t worry, it won’t affect your files, data, apps, user settings, etc. Only a fresh copy of macOS High Sierra will be installed on your Mac again.

Please note that if you need to remove the data and reset your Mac to factory settings, go for clean install macOS High Sierra. A clean install will delete everything associated with your profile, all your files and documents, while the reinstall will not.

Once you’ve decided that you want to keep all your data intact, take advantage of our comprehensive guide on how to reinstall macOS High Sierra. But before you start, you have to prepare your Mac for the process.

Before You Begin: Back Up Your Data

Although the process of reinstalling is safe, it is still recommended to back up your data. Should something go wrong, you’ll be able to easily restore all necessary files.

There are a few incredibly easy ways to back up the files, documents, applications, etc. So, you can choose the most convenient one for you. Recover-deleted-photos-app-pictures-mac-os-x. One of the possible Mac backup solutions built into macOS is Time Machine. It allows frequent automatic backups. Surely, you can use iCloud, Dropbox or any other external storage to back up essential data.

Before reinstalling the macOS High Sierra, you might also need to clean the system junk. And not the system junk alone, but also gigabytes of other unwanted files like app leftovers, browser extensions etc. You don’t want to reinstall the operating system with all the clutter it contains, do you? You can clean up your Mac manually, but using an app like CleanMyMac X will save you tons of time. It will scan the system and safely remove all junk in a matter of minutes.

Once you’ve backed up your files an

Mac Os High Sierra App Not Installing