Thanks Daniel and Ronni for further tips. Well, short story I have fixed this 
issue from the most unexpected thing. There was a kernel file relating to 
NetNanny which was a third party security program not been used for many many 
years. I had in my fury omitted to look clearly at the message Safari was 
giving me each time it failed. All l saw was “Not f..... working”! But tonight 
after a bit of calming I took a closer look. The message provided by Safari 
indicated this error code. “NSPOSIXErrorDomain:1”. When I googled this I got 
the third party security program issue and so I went hunting for stuff - it 
provided some locations to go looking. I found one solitary file “NetNanny 
Kernel Ext”. I trashed it and after a restart, bingo! Amazing. I would never 
have though that something that has been lurking there for years and not a 
problem since then and coinciding with an OSX update this all of a sudden 
became a problem. 

Lesson for me is to look at the error code next time!

I hope this can help others in some small way.

Regards


Pete

> On 4 Jun 2019, at 7:46 pm, Ronda Brown <[email protected]> wrote:
> 
> Hi Peter,
> 
> Have you run Wireless Diagnostics on Jo’s MBP?
> 
> Your Mac can use Wireless Diagnostics to perform additional analysis. 
>       • Quit any apps that are open, and connect to your Wi-Fi network, if 
> possible.
>       • Hold down the Option key and choose Open Wireless Diagnostics from 
> the Wi-Fi status menu <yosemite-disconnected_icon.png>.
>       • Enter your administrator name and password when prompted.
> Wireless Diagnostics begins analyzing your wireless environment:
> 
> Kind Regards,
> 
> Ronni
> 
>> On 4 Jun 2019, at 8:13 am, [email protected] wrote:
>> 
>> Hi Ronni, thanks for that one. I had omitted to mention in my list of things 
>> that I had tried that I saw an online tip to try this one. So I did already 
>> try it and sadly it didn't resolve the issue. It does seem after some of 
>> these tests that it pauses momentarily (I am using Safari and select Google 
>> web page to put to the test) before getting the "no internet connection:" 
>> message.  
>> 
>> Will have a calm look at it again tonight, sometimes I feel that in trying 
>> some of these items, it is the order in which they are tried seems to make a 
>> difference, although i am unclear on which order is the right order, the 
>> order from my side seems to be random.
>> 
>> Regards
>> 
>> Pete.
>> 
>> 
>> 
>> ----- Original Message -----
>> From:
>> [email protected]
>> 
>> To:
>> <[email protected]>
>> Cc:
>> 
>> Sent:
>> Tue, 4 Jun 2019 06:41:45 +0800
>> Subject:
>> Re: MacBook Pro with Wifi signal but no Internet
>> 
>> 
>> Hi Peter,
>> 
>> On Your wife’s MBP try:
>> Edit her Locations in Network Preferences. 
>> In Edit Locations, from the drop-down click the “+” to create a new 
>> Location, name it “Automatic” (any name will do)...
>> The new location will setup new a new default WiFi (and Ethernet and 
>> FireWire) and hopefully will connect to the Internet immediately.
>> 
>> Kind Regards,
>> Ronni
>> 
>>  Ronni Brown’s iPad Pro 12.9-inch 256GB 
>> 
>> 
>> > On 3 Jun 2019, at 9:19 pm, Peter Crisp <[email protected]> wrote:
>> > 
>> > Hi folks, I have had the issue as noted in the subject line before many 
>> > many times and I have been able to resolve albeit with many different 
>> > methods. 
>> > 
>> > My wife’s MBP 2011 has developed this problem, not surprisingly coincident 
>> > with the OSX update to 10.14.5. 
>> > 
>> > It all started when Jo said she had no sound from the MBA speakers. I did 
>> > the usual settings review and then did a reboot. This resolved the sound 
>> > issue. I can’t recall if this coincided with the update of the OSX too but 
>> > the sound is fixed. But we have no Internet service now. Things I have 
>> > done here:
>> > 
>> > PRAM reset
>> > SMC Reset
>> > Reboot
>> > PRAM reset
>> > SMC Reset
>> > Network reset 
>> > Forget Wifi connection and re-establish
>> > Clear DNS settings, Try the Google 8.8.8.8, try others, back to 10.1.1.1
>> > Renew DHCP licence
>> > Try to connect via a iPhone hotspot (which is accessing internet fine)
>> > 
>> > Is this a 10.14.5 issue? I can’t get to the internet with this MBP to do 
>> > anything about it. 
>> > 
>> > Any clues folks?
>> > 
>> > 
>> > Regards
>> > 
>> > 
>> > Pete
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