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Raspberry Pi launches its IPO
(www.raspberrypi.com)
This is a most excellent place for technology news and articles.
As someone running a pihole off an old radio 2B, your MacBook will be more than sufficient to run what is needed. My only advice would be to get an Ethernet adapter if that model doesn't have one. Losing valid dns queries due to wifi packet loss would be annoying. Beyond that, just google a guide and go, it's super straightforward to set up and manage.