As a Mac user I’ve always used Time Machine for local backups. The only issue is that it requires plugging a drive directly into your machine or buying an Apple Time Capsule. At $200 – $400 that’s not a cheap option for NAS backups.
Note: I always recommend having multiple backup sources and because this setup requires mimicking Apple protocol there is potential for data loss. Use at your own risk.
Full article here:
DIY Time Capsule with a Raspberry Pi (Caleb Woods)