X inside wifi icon, verifying apps,

Frost- wrote:

My 2012 MacBook Pro has a black X inside of black WiFi icon. WiFi still works,

but no network detected. There's no list on the left side and no location. When I add location, it's says "WiFi on" but no Ethernet even though it's connected. Also, it now says "verifying app" on every app I open every time I try to open it and some have stopped working. I haven't made any updates. I know it's an older computer, but I've had no problems until now

? Not sure how WiFi "still works" if it sees no Networks...

From >(Option key) System Information>Network> .... you see hardware recognized ?

If the Wifi Card has failed you can replace it on a mid-2012. Either do it your self or any third party computer shop that works on Mac.

Apple Store may deny service—see vintage and obsolete:

Obtaining service for your Apple product after an expired warranty - Apple Support

Obtaining service for your Apple product after an expired ...

Frost- wrote:

Thank you. So now my WiFi isn't working, but the Ethernet is. This is my system information for what you highlighted:

https://discussions.apple.com/content/attachment/14b805b4-3b2e-4efc-91ff-29c04c76fe39

This is the network:

https://discussions.apple.com/content/attachment/67a9ccc2-8b9b-4cf9-8967-5e2528dd6f21

This is when I click the plus sign:

https://discussions.apple.com/content/attachment/40706e99-6094-400b-b4bc-eb6e205a1888

This is after I add a location, even with the Ethernet cord attached:

https://discussions.apple.com/content/attachment/177d1711-9dc0-427b-ab22-b568a039fc1d

Have you shut down and restated your modem, your router, your computer...

Did you call your ISP and ask if there is an outage or an issue with your service?

How are you posting here? if other device connect to your Network this should tell you something.

if this is not an old issue, but a new issue, what changed?

Did you try reinstalling the macOS?

mid 2012 is considered obsolete—

see vintage and obsolete:

Obtaining service for your Apple product after an expired warranty - Apple Support

most any computer shop that works soon Mac can test further...