Edit: After half day, my wife’s Mac started having the same problem. I have then applied the solution that I found in the Apple
Apple Set To Sponsor John Lennon’s ‘Lennon Educational Tour Bus’
According to the website for John Lennon’s ‘Lennon Educational Tour Bus’ Apple is sponsoring the organisation which is a non-profit organisation aims to help and progress children in producing their own music and from the help of Apple they will now be able to do this by using Macs on board the bus.
If you want to keep up to date with all the latest events regarding the Lennon Educational Tour Bus they do already have an app available on the App store.
As can be seen from the image above the bus will also have the Apple logo on the front drivers side of the bus.