If your goal is purely – consider installing High Sierra on an external SSD or an older Mac mini connected to your TV. That way, you keep your main Mac modern but can boot into a “vintage entertainment mode” whenever you want.
High-Efficiency Video Coding (H.265) allows you to stream and store 4K video files using up to 40% less storage space than H.264. mac os x 1013 high sierra dmg download hot
Apple does not provide direct, standalone DMG download links on their main website. Instead, they distribute the installer through the Mac App Store or via terminal deployment packages. If your goal is purely – consider installing