My wireless Smart Keyboard isn’t connecting to my iMac

The following will require any USB keyboard and mouse. If you don’t have them, borrow or buy them, they are inexpensive!

1.     Connect the USB keyboard and mouse to the computer.

2.     Open System Preferences – Bluetooth

3.     Un-pair the wireless keyboard and mouse.

4.     Turn off Bluetooth

5.     Restart the computer in Safe Mode per the directions in https://support.apple.com/en-us/HT201262

6.     Restart the computer normally.

7.     Open System Preferences – Bluetooth

8.     Turn on Bluetooth

9.     Re-Pair the wireless keyboard and mouse.

10.  Unplug the USB keyboard and mouse and begin testing the wireless devices again. 

Has it connected and worked before, or is this a new keyboard?

If new, please don't be insulted by the next question, but it covers the most common cause of non-responsive new wireless keyboards we see here:

Is the keyboard turned on? The switch is quite small and some people fail to notice it:

https://www.ebay.com/itm/HP-Wired-USB-Keyboard-K1500-Black-Brand-New-Authentic-HP-H3C52AA-ABA/153919794715?epid=177243212&_trkparms=ispr%3D1&hash=item23d655ae1b:g:Bw8AAOSw6N9esRqu&amdata=enc%3AAQAFAAACYBaobrjLl8XobRIiIML1V4Imu%252Fn%252BzU5L90Z278x5ickkxGz2ccqatkEnoeekHqhLkdz348N%252BsmbGpy5hkOnNxld4DFmmEy1%252FvamO6uLAqkLcZ8xG2WbkIeRXDictKC%252BdHD4%252Fuk0t0NHNcXCiyjNrdEXYXUv5AW0I55cTnjQEiG5Rnv7v%252BgRNGcV1t4A0paf0xJGO9L4wUgKHpb9DCM72uPsh2R7Jwbrbi7jk%252FkxDq09SfFuUqoxG6v6BHH1HnXf1kfAyIr7dCmCTOAJ1g%252BsiKSCCP8XYggntrNM504UHPZ0yNwzJZ0cJ7lsccBnRuTbolXhpXNbYkgdBW5OdEso9Cgvqyl5LoI%252BBHFAstDZpC41ca%252BbE8Lc4%252FVXq50Tu000dlCBE%252FHK7bdhsaWE6McdMAfL7xtjn5je%252B5nwEEzVtPxgMPtjcMKURKrXae1tSy%252B0Y85TKbtQbtVL4isiThATJAKk6T0PvCyN%252FETX%252F0ll7tAuZGbR8YDhu8axrO2oMaR1D7iWu9bpy%252Fnm0cS6nd2IV6XOOyL5DqIjJwxug%252FaxoBulAGU5eYZSWbP6xUJMbdxPJ1G9FTsOn6sm1Vj5hqJa%252BRKC39SvqCOjR%252BgW0O8r6hgcg8OyEMVqbD4z4QwOkOif55mfsPD4Ur9ThV2cfbB2HsmryJVyHayTc3e%252F8Os4pUuKMhrEnstUuh3SU4Vs5T6ngHpSnhWZsS3JQQ70izSPXhMBndOW7uHYZyHgnmaoISGUnWWLmmWd%252BBJS1A%252Ff4HT6r25acK99xoTwYIXLEFvE5aSQIRQBVhmFGzyGEhPP8iibi%7Ccksum%3A153919794715ac7aea6c0d374b64b89faace77f59d35%7Campid%3APL_CLK%7Cclp%3A2334524

$8.49!

It has been working for years. Just quit yesterday.

I was trying to avoid buying another keyboard, don't have the money at the moment.

Does it work if you connect it to the Mac with a Lightning to USB cable?

$ You do not have $10?

It doesn't have a Lighting port.

Where can you find a keyboard for $10??? The cheapest one around here is $50.