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Repair Yosemite or El Capitan Logical CoreStorage Partition BUG.

1/13/2016

If you know what we're talking about and don't care about the why then skip down to "Fix".

Since Yosemite was released (and continues in El Capitan) our repair technicians started to notice a funny problem, Mac's were showing up with a incorrect disk partition scheme: Logical Core Partition or Encrypted Logical Core.

What the heck is this?
These two partitions schemes do have a place in the apple universe, they are intended for iMacs that have a "fusion drive." These are custom ordered iMacs that have an SSD to give the user speed and a standard rotational HD that provides massive storage space, and apple created a special partition scheme that would marry the two together so the user would see one single drive. Nice right?

Not really. When Yosemite was releases we began to see Non Fusion drive Mac change to this partition type completely at random and for completely unexplained reasons. We saw it the most in Macs with stock SSDs like the MacBook Airs and Retina Display MacBook Pros but also in HDD Macs too.

Why is this a problem?
When the internal HD is in the incorrect partition scheme the performance suffers considerably. We have repaired this problem on 8 of 10 macs so it's very prevalent. This requires some terminal work, but its super easy.

THE FIX

Open the terminal by clicking "GO" in the finder menu and selecting "Utilities" then double click "terminal."
Type and hit return: diskutil cs list
You'll see a list of CoreStorage UUID # and other info. Look for :"Logical Volume XXX..." and copy the long UUID number that is listed. This should be the fourth entry down on the tree. See image:

Now in the terminal type and hit enter: disktutil coreStorage revert <paste in the UUID code here, there is a space after "revert"> In this example it would look like should look like this:

The operation should only take a few moments and once finished your disk will be back to normal! Although we always recommend a backup before doing any work like this, this process wont erase anything, you can even run this directly from the system with the bug. **Thanks http://awesometoast.com/ for the image.

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Remove Stuck Bluetooth Devices from Mac

1/13/2016

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Sometimes you may encounter a situation where you have a long list of bluetooth items in your menu list, but they don't show up in the bluetooth preferences. So how do you remove them?

FIX
Option 1: Remove them one at a time.

Option Click the Bluetooth Menu Icon in the menu bar. That means hold option on your keyboard then click it. This will open up hidden options.
Hover over the device you want to remove which will open a secondary menu.
Select "Remove"

Option 2: Remove ALL the bluetooth devices at once.
WARNING: THIS WILL REMOVE EVERYTHING INCLUDING ALL THE DEVICES YOU MAY WANT.

Click your desktop background to ensure you're in the finder.
Click "GO" in the upper menu bar.
Select "Go to Folder"
Paste in this location and click GO : /Library/Preferences/com.apple.Bluetooth.plist
Move the file that is highlighted to the trash.
Restart your MAC. The bluetooth devices will be gone.

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Repair Yosemite or El Capitan Logical CoreStorage Partition BUG.

Remove Stuck Bluetooth Devices from Mac

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