Open your web browser and go to the official website. Search for the "How to download and install macOS" page.
No directly. You must erase your entire drive (APFS to HFS+ conversion may be required) and boot from USB media. Time Machine backups from newer OSes are not compatible. macos high sierra 10136 dmg
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. Open your web browser and go to the official website
Install the OS on multiple Macs without downloading it every single time. You must erase your entire drive (APFS to
The official download gives you an .app file. If you specifically need a .dmg file for virtualization or deployment, you can package it using Disk Utility or Terminal commands to create a blank disk image and copy the installer contents inside. How to Create a Bootable USB Installer