Mac local wifi kept dropping out now will not connect wifi network status showing off and I can not turn it on, ethernet to web is fine

Please_Help_Me_1_2_3 Said:

"Mac local wifi kept dropping out, now will not connect, wifi network status showing off and I can not turn it on, ethernet to web is fine"

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Troubleshooting Wi-Fi on a Mac:

A few thoughts to try...

I. Clear your Temporary Internet Files:

Boot into Safe Mode and then Clear your Temporary Internet Files of Safari:

1. Booting into Safe Mode: [hold down shift upon boot until the login screen appears]. See if this is still an issue. Safe Mode lets items run as default, without changes whatsoever. That is possible because caches of your macOS are temporarily disabled while in Safe Mode
2. Clearing your Temporary Internet Files (Cookies & Cache) of Safari: Cookies perform remembrance of certain site-entered data. Whereas Cache keeps a snapshot of the last time you visited a site.  Use this Link: Clearing History and Cache - Apple Communities

II. Restart your Router:

1. Power: off the router
2. Wait: 30 seconds
3. Power: It back on

III. Boot in Safe Mode:

[Hold Down: shift key, upon boot], In Safe Mode, Login Items do not run at login, certain preferences are set aside, and damaged system files are then reset. So, once booted in to Safe Mode, wait 30 seconds, and then boot up normally, attempting another update install.

IV. Try a New Admin User:

What happens when you create a new administrator user, and log into it? Do you still get this error? If not, then it is likely an error with the current user. If so, then it is likely an error with your Mac.

V. Reset your SMC and your NVRAM:

Sometimes changes (i.e. Installations) are made to the system and then settings (i.e. Networking) become corrupted, technically. So, reset both on your Mac. So, reset the SMC and reset the NVRAM or PRAM. It might take three tries. to fix this. So, be certain you have the time to do so.

Start With This:

• Reset NVRAM or PRAM on your Mac - Apple Support
• How to Reset the SMC of your Mac - Apple Support

Please_Help_Me_1_2_3 Said:

"I followed through to and including IV, I created a new Administrator but problem wasn't solved I deleted new Administrator, rebooted as original Administrator, problem wasn't solved but didn't have time to carry on. Left Mac turned on Returned a couple of hours later, had done nothing, problem solved, everything was and is still working fine Thanks very much for your help"

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You are welcome.

SMC and NVRAM Resets:

Having reset the SMC and the NVRAM I think is what solved this. It resets things, so that items (i.e. WiFi) work as they should.