I explained here how to make your @me.com email your primary email -
https://forums.macrumors.com/posts/14422065/
Hope that helps!
Dude, thank you so much!!
I just had this problem with my Apple ID after accepting the suggestion shown in my configuration page to use my Apple ID e-mail address as the main one…
The problem is, I have my account since 2004 so that is a dummy @mac.com address which I never really used as I never subscribed to either .Mac or MobileMe and, AFAIK, continued usage up until the very end of .Mac/MobileMe was a prerequisite to reuse those old addresses with iCloud Mail instead of having to create a new @me.com addresses (which I already did, and that has served me well and will do nicely as a primary address since I was already able, strangely enough, to log in to Apple ID with that new address even before it was a primary one — it used to be a gmail address —, just because it is the iCloud Mail address associated with that account… Meaning, iCloud users are probably getting hybrid Apple ID login addresses!).
I was afraid that, having an unusable address as the primary one, I could stop receiving iTunes/[Mac] App Store billing receipts but your suggestion worked a charm, so there's nothing to worry about anymore!
Anyway, I still get that uneasy feeling that I probably would've never figured out this on my own… I sincerely expected a better interface from Apple! I can understand that the main iCloud login (both on the Web and on System Preferences) is separate and different from the Apple ID configuration page, and that Apple support may offer yet another different login for their support page…
What I don't get is why is the latter more powerful and flexible than the former as far as editing settings and details is concerned? It does't make any sense; if anything, it should be the other way around, IMHO. That's a glaring omission from the main configuration page, which we should file as a bug…
