How to Disable Verbose Mode Startup on a Mac Mini

Open 'Applications > Utilities > Terminal.' The Terminal application allows the user to give text-based commands directly to the operating system.
Type the command “sudo nvram boot-args=” into the Terminal window and press enter. The command must be exactly as written and should not include the quotation marks.
Quit Terminal and restart the computer to verify that verbose mode startup has been disabled on your Mac Mini.
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How to Transfer Video to the MacBook Air (9 Steps)

Attach a USB hard drive to a secondary computer and copy any video files you wish to transfer to your MacBook Air. On either an OS X or Windows-based computer, highlight the files you want to transfer and use your mouse to drag them onto the external hard drive.
Eject the hard drive and connect it to your MacBook Air. Use the hard drive's USB cable to connect to a USB 2.0 port on the side of the MacBook Air.
Wait several seconds for the hard drive to appear within the MacBook Air's Finder. Select the hard drive's entry under 'Devices' --- on the left side of the Finder window --- to bring up the hard drive's contents.
Select the video files saved on the USB hard drive. Drag them with your mouse from the USB hard drive onto your MacBook's desktop. This will cause a transfer progress bar to appear. Once the bar is finished, your video files will be transferred onto the MacBook Air.
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How to Delete All of My Email at Once

Open your web-based email and log in using your username and password.
Click 'New Mail' or 'Inbox' to view your mail.
Click the very first check box that is on the line above the first email. This check box selects each email in your Inbox. If you need to keep certain emails, unselect the individual check boxes next to each email to prevent erasing them.
Press the 'Delete' button in the webmail interface to delete all of your selected emails.
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How to Right

Push the bottom-right corner of the touchpad to activate the location-based right-click. The MacBook touchpad also supports multi-finger gestures; continue to the next step to do this.
Push any part of the touchpad with two fingers together to activate the multi-finger right-click. The MacBook touchpad also supports a keyboard-based right-click; continue to the next step to do this.
Push and hold the 'Control' key before clicking with one finger anywhere on the touchpad to activate the keyboard-based right-click. This right-click also works on other Mac computers that do not use the new touchpad design.
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How to Find IPSW for Redsn0w 4.2.1 (3 Steps)

Download the appropriate 4.2.1 IPSW firmware file to your computer by clicking on Apple's link to the firmware file. Apple released three versions of this IPSW firmware file based on the type of iOS device you want to use with the firmware file.
Double-click the Redsn0w icon on your computer to launch the Redsn0w jailbreaking tool.
Select the iOS 4.2.1 IPSW firmware file you download to your computer when prompted to select the appropriate iOS 4.21. IPSW firmware file.
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