How to downgrade from macOS 26 Tahoe on a new Mac
Summary
Ars Technica explains that downgrading macOS 26 Tahoe on new Macs is usually possible using a bootable USB installer or a DFU restore, with security and compatibility caveats. It covers who can downgrade, the steps involved, and the potential downsides of staying on older OS versions versus upgrading again in the future.