Customize What Shows in the iTunes Sidebar

The iTunes sidebar is now invisible by default, but if you’re one of us who like to show the sidebar all the time you may also want to customize what’s visible in it. This lets you control whether or not to hide or show any of the iTunes library media types that are visible in the sidebar, like Music, Movies, Podcasts, and Apps, as well as the connected iOS devices, playlists, Genius, the iTunes Store, and network shared libraries.
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If you have ever downloaded an M3U file thinking you were going to get a song, audio file, or podcast, you’ve probably noticed the file size is tiny, and the m3u doesn’t really do anything on it’s own. This leads many users to wonder how to play the audio file, or how to convert that m3u into an mp3, m4a, or turn it into another familiar audio format. M3u’s are fairly misunderstood in that sense, they’re actually just a plain text playlist container file that is either a local playlist of audio, or a simple URL (link) to the actual audio content, usually intended to play as an audio stream. 
There are plenty of useful Mail plugins out there for Mac OS X, but sometimes their use wears out, or the plugin doesn’t get updated for a new version of the Mac Mail app which renders it unusable. If you’ve ever wanted to uninstall a Mail plugin in Mac OS X you’ve probably discovered that, 





Touch-based clicking is an alternate input form that uses trackpad (or Magic Mouse) taps as a click. For most Mac users,
Need to find a system file or several, but you aren’t entirely sure the directory path of where that system item is located on Mac OS? Maybe you’re looking for a plist file and you aren’t sure if it’s in the
The Control Center feature of iOS offers quick access to some of the more frequently used settings toggles on the iPad and iPhone, like wi-fi and orientation lock. This is undeniably convenient, but not every user wants these toggles to be readily available to anyone who picks up their device, and in some higher security situations these functions may be considered inappropriate to have easy access to. If security is more important than convenience, consider disabling access to Control Center from the lock screen.