Google account on Mac

Recently, I was confronted by a little annoyance while using my google account. I just enabled 2-factors authentication, and a while after, I noticed that I couldn't sync ma iPad's and Mac's iCal app. I also couldn't create fresh accounts. I read this post ... and everything was solved. The point is that some app do not handle login to google correctly when 2-factors authentication is enabled. By configuring app-specific passwords in Google accounts, the problem is solved. I just hadn't realized this, because I use 2 google accounts (one is private, the other is for work), and right after enabling 2-factors authentication on the first account, I also configured app-specific paswords for Mac -iCal and iPhone just for that one account, leaving the other partially configured.