Before seeking an image file, ensure your hardware is compatible: : Any Intel-based Mac (PowerPC is not supported). Memory : At least 1GB of RAM. Storage : 5GB of free disk space. Drive : A DVD drive or a USB port for a bootable installer. ⚠️ Important Safety Note

Once you have downloaded the DMG file, you can’t just drag it to a thumb drive. You need to "restore" it to make it bootable. Open Disk Utility . Plug in a USB drive (8GB or larger).

Since most modern Macs do not have DVD drives, and older Macs may have failing optical drives, installing from a DMG file usually involves creating a bootable USB drive.