: You can source official components for newer models through the Apple Self Service Repair Store. Current Software Delivery

: Apple and Amazon sell official USB-C and MagSafe 3 chargers (starting around $39–$79 ).

: Apple generally provides full security protection for the last three major macOS releases. To help you find the right "piece," could you clarify:

For any Mac made in the last 10–12 years, you typically do not buy a physical "piece" of software.

: Recent versions like macOS Tahoe are free downloads via the Software Update section in System Settings.

Physical retail "pieces" of the operating system are mostly used for restoring older PowerPC or early Intel Macs.

: If you are fixing an older machine, ensure you get a Retail Version (usually a purple "space" disc) rather than a grey "Machine Specific" disc, which may not work on different models. Essential Pieces for Your Mac