Three apps I use frequently when my Mac has problems: Your Mac will restart again - you'll hear the startup chime twice. You need to depress these after launching your Mac but before you see the grey screen. Launch your Mac while depressing the Command-Option-P-R keys on your keyboard.
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It's the closest thing to a nuclear option for Mac problems. I rarely do this, as it means system and device settings need to be put back in place. The Mac will launch Hardware Tests - these take a few minutes to complete but will identify any hardware problems you might have. To access these, Restart your Mac holding down the D key if this fails, Restart again holding Option-D. With Mavericks, reinstalling your System Software is a breeze: just enter Disk Recovery mode, from which you can do just that - just make sure you keep a backup.Īpple offers a suite of hardware tests you can run on Macs to find out if you truly have a hardware problem. You can also run Disk Utility in normal mode - you'll find it in the Utilities folder. Launch Disk Utility in this mode and Fix Permissions on your drive. Still having problems? Restart your Mac holding down the Command-R keys to enter Disk Recovery mode.
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This is sometimes all it takes to solve a problem. If they remain unrecognized, reset the PRAM (as explained below). Reconnect your Mac, reconnect the keyboard and mouse, Restart. Switch off your Mac, unplug the power cable, disconnect your peripherals and leave your system for five to 10 minutes. For scanners, try Vuescan for USB cameras, iUSBcam may help. Launch Terminal (it's in your Utilities folder) and enter the following exactly as shown: /usr/bin/drutil ejectįirst, check to make sure OS X supports the device.
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Restart your Mac and hold down the left mouse button until the disk ejects. Launch Disk Recovery mode and choose Utilities>Reset Password to create a new (and memorable) password for your Mac.