How to Change the Battery on an Apple Laptop (5 Steps)

Shut down your computer. Wait 10 minutes for the computer to cool before opening the battery door as it may be too hot to touch.
Turn your computer over so the bottom is facing up. Release the latch on the battery door. The latch is located on the right-hand side of the battery door. If you have a first-generation Macbook (made in 2007), turn the lock symbol from locked to unlocked.
Open the battery door. Remove the battery from its case by pulling up.
Unwrap the new battery. Place the new battery in at an angle, sliding it below the brackets. Press the battery down to secure it.
Close the battery door. Slide the latch shut or turn the lock to secure the battery door.
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How to Reset MacBook Memory

Shut down the MacBook by clicking the Apple Menu and clicking 'Shut Down.'
Start the MacBook and immediately hold down the 'Option,' 'Command,' 'R' and 'P' keys.
Release the keys when the MacBook restarts on its own.
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How to Reset an EFI Chip (8 Steps)

Shut down the computer.
Turn on the computer and immediately hold down the 'Command,' 'Option,' 'P' and 'R' keys at the same time.
Release the keys after you hear the computer beep a second time.
Check to see if the computer is operating properly. If not, continue through the next steps.
Reboot the computer and hold down the 'Command,' 'Option,' 'O' and 'F' keys at the same time during startup.
Wait until you see the message 'To continue booting, type 'mac-boot' and press return.' If the message does not appear, try starting the computer by holding down the power button continuously until the message appears.
Type 'reset-nvram' and press 'Return.'
Type 'reset-all' and press 'Return.'
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How to Restore a Custom iPhone IPSW

Back up your crucial iPhone data.
Open iTunes. Connect your iPhone to your computer using the iPhone USB cable.
Hold the 'Home' and 'Sleep' buttons down simultaneously for 10 seconds.
Release the 'Sleep' button immediately after 10 seconds are up. Continue to hold down the 'Home' button. If done successfully, iTunes will display a dialog window informing you that it has detected an iPhone in recovery mode. Click 'OK' and you are taken to the iPhone restore page. The timing is tricky and it may take a few tries.
Hold down 'Control' (or 'Option' on a Mac) and click 'Restore.' This will bring up a file browser. Locate the custom IPSW firmware and click 'Open.' iTunes will begin restoring the iPhone using the custom firmware. A progress bar will indicate how far along the process is and a progress bar will also display on the iPhone. A confirmation dialog will inform you of the successful restore.
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How Do I Get the Waiting Icon Off of My iPad?

Press and hold the 'Off' button.
Press and hold the 'Home' button.
Release both buttons when the Apple logo appears on the iPad screen. The iPad should restart without the 'Waiting' icon.
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