That's good to hear Peter thanks for letting me know all is ok now. 
I'm sure your son will have leant something and will now enjoy using Sierra, it 
is a great operating system!

And- hey Peter sorry about the Eagles, but 'The Pies' had a win! Yay 😊 

Cheers,
Ronni

Sent from Ronni's iPhone 7 Plus

> On 9 Apr 2017, at 7:22 pm, Peter Crisp <[email protected]> wrote:
> 
> Hi Ronnie, problem is sorted now, did these items in your instructions all 
> seems good. I am so relieved thanks for your spot on advice again, my son 
> very thankful too.
> 
> Regards
> 
> Pete
>> On 9 Apr 2017, at 7:30 am, Ronni Brown <[email protected]> wrote:
>> 
>> Forgot to mention Peter in previous email - Make sure your son follows 
>> closely and performs the post installation Tasks after running the Combo 
>> Update., I would suspect he missed some of this in his first attempt to 
>> upgrade from Yosemite to Sierra.
>> 
>> Perform Post-installation Tasks:
>> A) Respond to Immediate Questions
>> Among the most common questions are requests for your user account password 
>> or Apple ID password. For example, certain apps may once again need an 
>> administrator’s authorization to make changes to your data, and various apps 
>> that use your Apple ID (including iTunes and iBooks) may need you to sign in 
>> again.
>> 
>> Check System Preferences > iCloud to make sure you’re signed in to iCloud 
>> (and with the correct Apple ID). Do the same in iTunes (Account > View My 
>> Account) and the App Store (Store > View My Account).
>> NOTE:  Make sure ā€œiCloud Driveā€ in NOT activated! (unless you wish to use 
>> it; you can set it up at a later date if needed)
>> 
>> B) The next thing you should do is to update macOS itself (and any other 
>> crucial Apple software) to the latest version. Sometimes Apple releases bug 
>> fixes and security updates almost immediately after a major upgrade, and if 
>> any such urgent updates are available, it’s in your best interest to install 
>> them right away.
>> 
>> C) Review the Incompatible Software Folder
>> If the Sierra installer encounters any known incompatibilities, it moves the 
>> problematic software to an Incompatible Software folder and explains what it 
>> moved on one of the final screens of Setup Assistant. (After Setup Assistant 
>> quits, you can find the Incompatible Software folder at the top level of 
>> your startup disk, at the top level of your home folder, or even in both 
>> places, depending on the location of the soft- ware that was disabled.)
>> 
>> D) Deal with Other Surprises
>> Apple Mail:  The first time you launch Mail, a window informs you that it’s 
>> ā€œupgradingā€ your mail database. This step should take no more than a few 
>> minutes, and is necessary because the Sierra version of Mail has updated the 
>> database format it uses to store information about your messages.
>> 
>> Mail plug-ins: The first time you open Mail after upgrading, it moves most 
>> incompatible third-party plug-ins (which are normally stored in 
>> ~/Library/Mail/Bundles) into ~/Library/Mail/Bundles (Disabled) and displays 
>> an alert telling you what it’s disabled. Don’t try to reenable these 
>> manually; Mail will thwart your every effort to get them working. 
>> Check with the developer to see if a Sierra- compatible update is available.
>> 
>> E) System Preferences Changes:
>> As usual, Apple added, moved, and renamed a few items in System Preferences.
>> I won’t do into the changes here, I’m just alerting you to check.
>> 
>> Cheers,
>> Ronni
>> 
>>> On 9 Apr 2017, at 7:10 am, Ronni Brown <[email protected]> wrote:
>>> 
>>> Hi Peter,
>>> 
>>> Download and install the Combo macOS Sierra 10.12.4 Combo Update on your 
>>> son’s MacBook Pro.
>>> 
>>> Download macOS Sierra 10.12.4 Combo Update
>>> 
>>>  https://support.apple.com/kb/DL1910?locale=en_US
>>> 
>>> Let me know if that corrects his problems.
>>> 
>>> Cheers,
>>> Ronni
>>> 
>>> 13-inch MacBook Air (April 2014)
>>> 1.7GHz Dual-Core Intel Core i7, Turbo Boost to 3.3GHz
>>> 8GB 1600MHz LPDDR3 SDRAM
>>> 512GB PCIe-based Flash Storage
>>> 
>>> macOS Sierra 10.12.4
>>> 
>>>> On 9 Apr 2017, at 6:43 am, Peter Crisp <[email protected]> wrote:
>>>> 
>>>> On Friday evening my son pushed the OSX Update on his MacBook Pro (late 
>>>> 2011) to move to Sierra 10.12.4 from Yosemite. The update went fine and I 
>>>> forced a TM backup prior to starting. It seems to have all worked ok and 
>>>> even the backup processed without hitch (unlike my own issue with 
>>>> FileVault now resolved). His MacBook is still set with FileVault OFF. 
>>>> 
>>>> Short story is that he cannot access the Internet. Safari or Google Chrome 
>>>> both will not respond - progress bar stops about 10% in and then stuck. 
>>>> Network diagnostic assistance says "Your internet connection appears to be 
>>>> working correctly". Backups to WiFi TM are working fine. Unable to login 
>>>> to iCloud from his MacBook as no external Comms. I've checked his password 
>>>> using myiPad in "Manage my AppleID" and this password is clearly not the 
>>>> cause of error - just simply no Comms to outside the house.
>>>> 
>>>> All other computers and devices no problem communicating outside.
>>>> 
>>>> I had a browse and others have indicated Safari problems with the 10.12.4 
>>>> update and that rolling back to 10.12.3 resolves the issue. Not an option 
>>>> here as he has come 'from' Yosemite. 
>>>> 
>>>> All other apps requiring external Comms also do not respond; Mail, iTunes, 
>>>> iCloud music etc. I even replicated the DNS settings from my MacBook all 
>>>> to no avail. 
>>>> 
>>>> All clues anyone? Anything is possible after the Dockers rolled the 
>>>> reigning premiers!!
>>>> 
>>>> Regards
>>>> 
>>>> 
>>>> Pete
>>> 
>>> 
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> 
> 
> 
> Peter Crisp
> [email protected]
> 
> 
> 
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