After installing an update on her MacBook, a user contacts the technician to complain that the WiFi is not working. The WiFi icon displays that it has connectivity, but the user is unable to browse. Which of the following could be the issue?
Reset the Parameter RAM. PRAM memory can occasionally be the cause of various technical issues, so if you have WiFi difficutly, try to reset it.
If you are receiving a message stating that a piece of hardware is unavailable, it usually points in the direction of it not being installed correctly. Or in this scenario, not being installed at all due to incompatibility.

It is commonly known as "Parameter Random Access Memory". It is a memory that is used to store the settings of the system of a Mac OS. These settings comprise of monitor settings, speaking settings, WI-FI settings, etc.
So, according to the given case when the WI-FI icon shows that the system is connected to the internet but he is not able to browse the internet. In this case, he needs to reset the PRAM to browse the internet.

So that the above is the right answer.