If you want to control your PC or Mac using your smartphone or want to access any file or document from it, you can do so using Remote Desktop Connection feature. This feature uses the RDP (Remote Desktop Protocol) and allows users to control or manage the host machine remotely on your local network or over the internet.
I replaced an old Mac laptop with a new MacBook Air, and now the scroll bars keep vanishing. How do I get them back? If you don't agree with Apple's judgment that scrolling in OS X should work as it does in iOS — where you can't see the scroll bar until you actually try to move up or down a page or document — you can fix it in four clicks. But if you've gone from a well-aged Mac that hasn't been able to run recent releases of Apple's operating system, the ongoing mashup of iOS and OS X interfaces will be new to you, and so will the workarounds for these changes. (Apple's Mac-migration tools generally do a fine job of moving applications, data files and program settings from one Mac to another, but there are no scroll-bar-visibility settings in 2009's Snow Leopard to preserve — leaving the default settings of newer releases free to take over.) In this case, you'll want to click on the Apple-icon menu at the top-left corner (that's one click), choose System Preferences (two), select the General category (three) and, next to the 'Show scroll bars' heading, click the button next to 'Always' (four).
Almost three and a half years after Apple dropped this change on users in 2011's Lion release, I still don't understand what problem Apple was trying to solve. Laptop and desktop computers don't have the compact screens of smartphones and tablets. And they're often used to view and work on much longer documents, in which a scroll bar's sliding 'thumb' control makes it obvious how far along you are. So why force a fundamental part of the onscreen interface to pull this disappearing act? Mac users skipping multiple versions of OS X on their way to a new computer may find two other iOS-influenced changes confusing but less irritating. One is the way Apple would prefer you get at your apps: Not by opening a Finder window and navigating to your Applications folder, but by clicking Launchpad's rocketship icon in the Dock.
This will fill the screen with a grid of app icons, much like an iPad's home screen. You can click on any one to launch it, but it can be faster to start typing a program's name, watch Launchpad cull the selection to feature only titles matching that search, and hit Enter once only one matching title remains. The other is the ability to add your social-media accounts to OS X, via the Internet Accounts pane in System Preferences. Your reward for doing that is being able to post things to Facebook, Twitter and so on from pretty much anywhere in the system, not just whatever browser is logged into those social networks.
For those with Android or iOS devices there is an Android and an iOS app available on the Google Play Store and the Apple App Store, to download for free. Search for songs, Bible verses, images and more without needing to touch the computer.
But remember that Apple's aging, due-to-be-replaced iPhoto may require you to enter those logins a second time. When I tested it, that photo-album app picked up on a Twitter account I'd added to OS X but knew nothing about a Facebook login I'd saved to the system. Tip: Find resource-hogging Web pages in OS X's Activity Monitor When Apple shipped OS X Yosemite, it didn't announce one change to the Activity Monitor app that I've long relied on to report how much memory and processing power, and even energy, each program consumes.