New answers tagged troubleshooting
Boot in single user mode (Hold down SHIFT key right after hitting the power button until the Apple Logo appears), Login, Launch System Preferences, Load the Preferences Pane that is not working, Restart Mac OS X. That worked for me when nothing else did.
I ran into the same problem, iMAC would not boot past the white screen, and I had lost my recovery disks. so I went to Apple website and bought more recovery disks, and when it booted up into recovery mode, it was not showing a target disk to install the op system because it was corrupt, so I then opened up the disk utility and erased the hard drive and then ...
Only solution for general sluggishness was a reinstall. There is a problem with Y.
This is a known issue in Yosemite, although it doesn't affect everyone - I have 5 Macs running Yosemite and one suffers badly, but the others not at all. Temporary relief comes from rebooting or stopping and restarting the affected services. For discoveryd, in Terminal, do: sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.discoveryd.plist ...
I couldn't possibly venture a guess as to "why" except to chalk it up to Murphy... However Mac O/S is very picky when it comes to RAM. It is my guess that Apple updated some of the code in the O/S that checks for issues with RAM and it noticed a problem. That it now works with the RAM effectively swapped is even more puzzling. It is possible that there is ...
I know a really easy way to fix this(if you have an Apple TV). Go to someone else's laptop and duplicate finder and put on a USB flash drive. Put the flash drive in your computer and turn on the Apple TV and aim and press the button on the remote at your computer (iTunes should open up). In iTunes, go to the Apple icon in the top left corner and open System ...
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