It has been over a week since the Apple Developer Center Web site went offline, with no indication of when it will be fully back. However, Apple has created a status page displaying an itemized checklist of what services are online. (Alas, you can’t click the icons to bring services up and down!) In email to developers, Apple announced that it is prioritizing the order in which updated systems will be made available. Certificates, Identifiers & Profiles, Apple Developer Forums, Bug Reporter, pre-release developer libraries, and videos will be available first, followed by software downloads and remaining systems. (Most Developer Center systems have since come back online.)follow link
Open Files with App Switcher
Using the Application Switcher to open files can sometimes be faster than hunting for an Application's window or searching through a jam packed Dock for an Application's icon. First grab your file, press Command-Tab, and then drop the file onto the desired application's icon to open it within that program.
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Apple Deploys Developer Center System Status Page