As we reported previously, users who switch away from the iPhone are having trouble with their phone numbers remaining tied to iMessage, causing them to miss SMS text messages from other iPhone users. Apple told Re/code that it has fixed a server-side bug that was partially responsible for the issue and that it is working on a software update to address the issue more fully. follow link
Option-Click in Scroll Bars for Jump Scrolling
In Mac OS X in general, and thus in most native Mac OS X applications, hold down the Option key and click anywhere in a window's scroll bar to jump to that spot (rather than scrolling one screen). If you like this behavior, you can make it the default in the Appearance preference pane. For "Click in the scroll bar to:" select "Jump to here."
Apple Working on a Fix for the iMessage Trap