Follow the steps here.

If you encountered the problem that the downloaded Install High Sierra file only has 19MB.

Then, check your OSX version and App Store version.


For me, I need to update to El Capitan 10.11.6 and update App Store to download the full file (after deleting the 19MB file, and re-download).

If you’re downloading macOS High Sierra, use a Mac with High Sierra, Sierra 10.12.5 or later, or El Capitan 10.11.6. – How to create a bootable installer for macOS

Keep following the link, and finally change the screen resolutions using this.

For me, I changed it to 1920x1080.

Further Reading

  1. How to Install macOS High Sierra in VirtualBox on Windows 10 | How-To Geek
  2. Fix VirtualBox macOS High Sierra Screen Resolution (1920×1080 – 4K – 5K) | wikigain
  3. How to create a bootable installer for macOS | Apple Support
  4. 如何製作 macOS 10.13 High Sierra USB 系統安裝隨身碟 | AppleFans