: Highly sought after as the final version to support PowerPC Macs.
Physical retail "pieces" of the operating system are mostly used for restoring older PowerPC or early Intel Macs. buy osx
: Specialized retailers like iFixit and OWC (MacSales) offer DIY kits for internal upgrades, including batteries (approx. $80–$135 ) and SSDs. : Highly sought after as the final version