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Yes I have done that. I even trashed the network settings and reset them up. It sees the router but will not connect to it.

What kind of router do you have (brand and band 2.4G, 5G AC etc?!?)? Do you have other devices connected to the router? If so, can you temporarily disconnect all devices and only allow your Mini to see and connect to your router?
 
When I did the install I had an ethernet cable plugged in because my wifi is slow and will take a long time to install.
I already did what you told me to do.
Still not working.
 
When I did the install I had an ethernet cable plugged in because my wifi is slow and will take a long time to install.
I already did what you told me to do.
Still not working.

You need to disconnect your ethernet cable from the Mini and re-try to connect to the WIFI router using WIFI. Can you tell me what sort of router you have and if your other devices can connect to it? Sometimes with old routers, there are only a few channels available and if other devices took them, then the Mini can not connect. Which is why you need to disconnect all WIFI devices to the router to test. Once you connect your Mini to the router, then you can reconnect all devices.
 
I have a Netgear wnr3500u / 30500l (older) but never had a problem before. Other Macs are connected to it with no problems wirelessly along with two (2) Hp printers. Noting else is having a problem connecting to it. I live in a very un populated area of Prescott (very rural) and I see no other available networks that could be causing problems. The closest building to my house is around a half km (0.5) away from me.
 
iluvmacs wrote:
"Not if you're running a compatible boot drive like the Vantec NexStar TX. You need to fix the WIFI issues that was probably caused by the Carbon Cloner OS from the other enclosure that wasn't compatible and corrupted your configuration files or the SMC (System Management Controller) settings."

I have never NEVER had any kind of wifi problems booting from a cloned drive, or from a setup that was restored from a cloned drive.

NEVER.

The OP's wifi problems are due to something else.

TURN OFF the router AND the modem (if you're using one).
Wait 30 seconds, and then turn them back on.
Does that change anything?

Are the Mini and router in the same room?
Can you run an ethernet Cat 5e cable from the router to the Mini?
That will solve your wifi problems.
 
iluvmacs wrote:
"Not if you're running a compatible boot drive like the Vantec NexStar TX. You need to fix the WIFI issues that was probably caused by the Carbon Cloner OS from the other enclosure that wasn't compatible and corrupted your configuration files or the SMC (System Management Controller) settings."

I have never NEVER had any kind of wifi problems booting from a cloned drive, or from a setup that was restored from a cloned drive.

NEVER.

The OP's wifi problems are due to something else.

TURN OFF the router AND the modem (if you're using one).
Wait 30 seconds, and then turn them back on.
Does that change anything?

Are the Mini and router in the same room?
Can you run an ethernet Cat 5e cable from the router to the Mini?
That will solve your wifi problems.

Did that. Even factory reset the router.
Yes they are in the same room.
Yes I can run a ethernet cable from the router to the mini.
But why I am I having a problem after doing this? That is what I want to know.
 
Did that. Even factory reset the router.
Yes they are in the same room.
Yes I can run a ethernet cable from the router to the mini.
But why I am I having a problem after doing this? That is what I want to know.

Did you do this according to the instructions on the link I gave you?

Go into /Library/Preferences/SystemConfiguration/

Delete these files:

com.apple.airport.preferences.plist
com.apple.network.identification.plist
NetworkInterfaces.plist
preferences.plist

And then reboot.

If this did not resolve the problem, please read this below from Apple. I had the same issue after Mojave and my fix was, following Apple's advice, is to connect to my 5Ghz router band and that worked with my Macbook Air when the USB 3 is on. When it's off, I can connect to the 2.4Ghz band.

Why do I have difficulty with Wi-Fi or Bluetooth devices when USB 3 devices are attached to my computer?
Some USB 3 devices can generate radio frequency interference that can cause Wi-Fi and Bluetooth devices operating in the 2.4GHz band to have issues communicating with your computer. Here are some tips to avoid this issue:

  • If your USB device has a cable long enough that you can move the device, place it away from your Mac—and make sure not to place it behind your Mac, or near the hinge of its display. The antennas for Wi-Fi and Bluetooth are located there, and USB 3 devices placed there might interfere with your wireless connections.
  • If you're using adapters or dongles on a Mac computer with Thunderbolt 3 (USB-C) ports, plug them into the front port on the left side of your Mac, or into the ports on the right side (if your computer has them). These ports are the farthest away from the antennas, making interference less likely.
  • To avoid interference on the 2.4GHz band using Wi-Fi, try using the 5GHz band instead. You can change this on your wireless base station. Bluetooth always uses 2.4GHz, so this alternative isn't available for Bluetooth.
 
Did you do this according to the instructions on the link I gave you?

Go into /Library/Preferences/SystemConfiguration/

Delete these files:

com.apple.airport.preferences.plist
com.apple.network.identification.plist
NetworkInterfaces.plist
preferences.plist

And then reboot.

If this did not resolve the problem, please read this below from Apple. I had the same issue after Mojave and my fix was, following Apple's advice, is to connect to my 5Ghz router band and that worked with my Macbook Air when the USB 3 is on. When it's off, I can connect to the 2.4Ghz band.

Why do I have difficulty with Wi-Fi or Bluetooth devices when USB 3 devices are attached to my computer?
Some USB 3 devices can generate radio frequency interference that can cause Wi-Fi and Bluetooth devices operating in the 2.4GHz band to have issues communicating with your computer. Here are some tips to avoid this issue:

  • If your USB device has a cable long enough that you can move the device, place it away from your Mac—and make sure not to place it behind your Mac, or near the hinge of its display. The antennas for Wi-Fi and Bluetooth are located there, and USB 3 devices placed there might interfere with your wireless connections.
  • If you're using adapters or dongles on a Mac computer with Thunderbolt 3 (USB-C) ports, plug them into the front port on the left side of your Mac, or into the ports on the right side (if your computer has them). These ports are the farthest away from the antennas, making interference less likely.
  • To avoid interference on the 2.4GHz band using Wi-Fi, try using the 5GHz band instead. You can change this on your wireless base station. Bluetooth always uses 2.4GHz, so this alternative isn't available for Bluetooth.
I already did that.
I did shut down the computer and moved it from the USB port that it next to the audio inputs/outputs and sd card reader and moved to the one next to the thunderbolt 2 ports and I got wifi back.
I did not realise that it mattered what port I plugged it to.
So that issue is fixed.
Wow 109 posts just to get this resolved.
 
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