For computers from the early to mid 2010s in particular, the wifi card might be reported as not fitted or working. try these steps.
Reset the SMC Reset the PRAM Remove the file: /etc/sysctl.conf The problem might be wifi/Bluetooth cable, it runs over the disc drive and is prone to failure.
I usually write a blog post about once a week. The latest post can be viewed here: An Empathy Deficit: They end up reducing the total empathy in the world. (posted 2025-06-28 at 14:17:10). I do podcasts too!. You can listen to my latest podcast, here: OJB's Podcast 2025-05-31 Respect the Flag: Find me a Maori flag and I will burn it..