Suddenly, after years of problem-free use, Apple Mail suddenly cannot read and sync with Google Apps IMAP. Ever since the later iterations of Leopard, and now with Snow Leopard, I never had major problems with Apple Mail and Google Apps IMAP. Now, soon after Google forcibly transitioned my Google Apps account to their new infrastructure that has the dozens of new features. It's been a progressive rollout by Google, which means that accounts have been transitioned over a period of months. So the reports of this error seem to have occurred also over the last few months. - Google Apps transitions the account to its new infrastructure. - Apple Mail cannot sync and read Google Apps IMAP - iPhone's Mail has the same problem with Google Apps IMAP - webmail works fine - consistently, everyone says their webmail works fine - iPhone indicates a username password error - IMAP has been working for years, and suddenly won't work Some people suggest deleting the captcha, and this works for some, but for most it does not work. A consistent plea on all the forum posts is the cry to Google to fix this. Back in March 2011 a Google employee acknowledged the problem, but that is 2 months back. http://www.google.com/support/forum/p/gmail/thread?tid=1e97f1a6d73af1e6&hl=en People use Google Apps for business, so this is a major disaster for many people and organisations. To see other posts on this problem, Google this, using quotation marks for phrases: "apple mail" "google apps" imap username password error A common ending on posts on this problem is that people ask if anyone else has the problem, but no answers - and I've Googled the web for answers, just like the other strugglers. It seems to affect some users who are transitioning to Google Apps new infrastructure. It's frustrating since Apple Mail/Google Apps has worked fine for years, and suddenly it has tanked.