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Question: I am trying to do a clean install from Yosemite to High Sierra. The boot installer is only downloading 19.5MB instead of the 5GB's. Any help would be appreciated.

You need to create a bootable installer USB drive. Here is what you must do:


1. Download macOS Sierra from the Mac App Store

2. After the download has finished, plug in your USB drive (at least 8 GB or more). Name it MyVolume

3. Run the following command:


sudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install\ macOS\ Sierra.app


4. Type in your administrator-password. There are no digits showing that you are typing your password in. Press ⏎.

5. Press "y". Remember, all of the data on the USB drive will be removed.

6. Once the process has finished, shut down your Mac.

7. Boot your Mac up using ⌥ down.

8. Choose the USB drive called "Install macOS Sierra" as your startup disk.

9. Choose "Install a new copy of macOS". The installer will guide you through the installation process.

10. Have fun with your new macOS Sierra!

MacBook Pro with Retina display

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Mar 15, 2018 12:08 PM in response to sebastin253 In response to sebastin253

Go to the App Store and look for the Install macOS High Sierra file. Click on the icon to open the description page. On the right check the file size. The link here is from the Developers forum but you may get access to it.

Mar 15, 2018 12:08 PM

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Mar 15, 2018 3:05 PM in response to Kappy In response to Kappy

I ran the installer, 19.5M. After telling it to continue it did its thing - which took some time then another 40+ minutes for the install. I now have High Sierra, Version 10.13.3 (just finished installing). Everything looks okay, but I haven't had time to take a real close look yet. That will have to wait until I get the family fed. Thanks for all you help!

Mar 15, 2018 3:05 PM

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User profile for user: sebastin253

Question: I am trying to do a clean install from Yosemite to High Sierra. The boot installer is only downloading 19.5MB instead of the 5GB's. Any help would be appreciated.