macbook pro os x cannot connect to app store

In the case of updating to OS X 10.10.4, it appears to be some battle between the AppStore servers themselves and the AppStore app on your Mac. Of course it is possible that Apple’s servers are simply slammed right now, but this is a gigantic company that can afford bandwidth. You’re just going along minding your own business, trying to update to the latest shiny release of Apple OS X (10.10.4 in this case), and alas, the only vehicle to do this is Apple’s AppStore. PLEASE help.I hope Apple pours some of their riches into better Software QA some day, but if you are attempting to update to Mac OS X Yosemite 10.10.4 and your AppStore is crashing and hanging, here is how to fix it. I need to solve this by tomorrow morning. how do I do that? On the IMac in question I cannot access any software that will allow me on to the internet to download Yosemite - I have Macbook Pro : Can I download the OS on to an external hard drive and use it to boot/install on the Imac? Where can I get an 'external' copy of Yosemite (I have looked but found nothing). I read online that this is a common problem when trying to install OS X El Capitan 'directly', and that I first need to install Yosemite. but it will not install!! I keep getting prompted to re-enter my account info, which is accepted, but when I click on 'continue', another page appears again asking me to log in. The problem is that when i do so (apple id etc all OK), i am prompted to install OS X El Capitan.

The computer now boots up into the Utility Disk, prompting me to reinstall OS X.

i thus did a full erase of all the data (only backing up the files I needed). Hi, I am due to hand over my Imac (2012) tomorrow.

Macbook pro os x cannot connect to app store