High Sierra Mac App Store
1. Go to the Dock and launch your App Store on your Mac computer.
2. Go to the search box afterward. Type out “High Sierra” within its search box. Then, it would help if you pressed the key for Enter. If you cannot find the macOS High Sierra on your App Store for Mac, visit the next step.
3. Click this support page to help you get older versions of Mac’s operating systems.
4. Go to the macOS High Sierra download link. You will see it within the heading called “Download macOS”.
5. Then, click the link for macOS High Sierra. Then, connect to the App Store Mac. Ensure that you are connected to it. Then, a pop-up will be displayed. This will be the menu for the App Store. You will now see the download button for your macOS High Sierra.
6. Lastly, press the Download link and wait until the download process is complete.
So, by clicking the Get button you can download High Seirra.