Apple officially offers the installer as a free download for older machines that cannot run newer versions of macOS . While it was originally a paid upgrade, Apple made it free in June 2021 to support legacy hardware. Direct Download Link
Intel Core 2 Duo, Core i3, Core i5, Core i7, or Xeon. Mac OS X Lion 10.7.5 Free Download
Open the .pkg file inside the disk image. This will install an app named "Install Mac OS X Lion" into your Applications folder. Apple officially offers the installer as a free
You can download the official DMG installer directly from the Apple Support Download Page . Mac OS X Lion 10.7.5 Free Download
Already running OS X Snow Leopard 10.6.6 or later (10.6.8 recommended). Memory: At least 2GB of RAM . Storage: At least 7GB of available space . How to Install