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: Sack Them All!: Let's find all the corrupt and incompetent managers and sack them all! (posted 2024-07-24 at 19:47:48). I do podcasts too!. You can listen to my latest podcast, here: OJB's Podcast 2024-04-30 The Fall of Rome: I'm afraid that we really might be seeing the demise of the greatest era in history..