This initial version cannot be installed in my mbp. I tried from app store - apple servers, it stucked. I also downloaded from elsewhere, I tried again to install, stuck in the same point again. I cannot suppose that it is my mbp fault. Why should I blame mbp? It is late '13 with yosemite. I cannot 'track' where the problem is based. If you have any idea, just tell me. I had to restore back to yosemite. I am thinking remaining in yosemite for the next time period, and try once again to install when apple will give us an upgraded package of el capitan. How this could be done? I mean, if a new version of el capitan appears, the existing one will disappear from app store and I will see only the new one? Or I should download the current 'crap' and then any updates? Is there any 'build numbers' I can see in app store? When I will read in the news, that a new el capitan version is out, can I assume and expect, that it will be an accumulative update with the initial os wrapped up with the new updates, in app store? As you understand I fear to try installation with this one, once again, but I want to be ready and sure of how I can try install the new version, when it will be available.