Q: Macbook Air Issues After 10.10.4 Upgrade

Problems such as yours are sometimes caused by files that should belong to you but are locked or have wrong permissions. This procedure will check for such files. It makes no changes and therefore is not, in itself, a solution.

First, empty the Trash, if possible.

Triple-click anywhere in the line below on this page to select it, then copy the selected text to the Clipboard by pressing the key combination command-C:

find ~ $TMPDIR.. \( -flags +sappnd,schg,uappnd,uchg -o ! -user $UID -o ! -perm -600 \) 2>&- | wc -l | pbcopy

Launch the built-in Terminal application in any of the following ways:

☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)

☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.

☞ Open LaunchPad and start typing the name.

Paste into the Terminal window by pressing command-V. The command may take a noticeable amount of time to run.

Wait for a new line ending in a dollar sign ($) to appear.

The output of the command will be a number. It's automatically copied to the Clipboard. Please paste it into a reply.

The Terminal window doesn't show the output. Please don't copy anything from there.

A

Back up all data before proceeding.

Launch the Keychain Access application in any of the following ways:

☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)

☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.

☞ Open LaunchPad and start typing the name.

Select the login keychain from the list on the left side of the Keychain Access window. If your default keychain has a different name, select that.

If the lock icon in the top left corner of the window shows that the keychain is locked, click to unlock it. You'll be prompted for the keychain password, which is the same as your login password, unless you've changed it.

Right-click or control-click the login entry in the list. From the menu that pops up, select

          Change Settings for Keychain "login"

In the sheet that opens, uncheck both boxes, if not already unchecked.

From the menu bar, select

          Keychain Access ▹ Preferences... ▹ First Aid

There are four checkboxes in the window that opens. Check all of them. if they're not already checked. Close the window.

Select

          Keychain Access ▹ Keychain First Aid

from the menu bar and repair the keychain. Quit Keychain Access.

If you use iCloud Keychain, open the iCloud preference pane and uncheck the Keychain box. You'll be prompted to delete the local iCloud keychain. Confirm. Then re-check the box. Follow one of the procedures described in this support article to set up iCloud Keychain on an additional device.

B

Back up all data before proceeding.

Step 1

In the Finder, hold down the option key and select

          Go ▹ Library

from the menu bar. From the Library folder, move the following item to the Trash, if it exists:

          Application Support/Dock

and move the following items to the Desktop (again, some may not exist):

          Preferences/ByHost/com.apple.dock.*.plist

          Preferences/com.apple.dock.db

          Preferences/com.apple.dock.plist

Here, * stands for a long string of letters and numbers.

Log out or restart the computer and test. If you still have the issue, put the items on the Desktop back where they came from and go to Step 2. Otherwise, delete the items.

Step 2

Restart the computer in safe mode. Certain caches maintained by the system will be rebuilt.

Safe mode is much slower to start up than normal.

When the login screen appears, restart as usual (not in safe mode) and test. There's no need to log in while in safe mode.

Note: If FileVault is enabled in OS X 10.9 or earlier, or if a firmware password is set, or if the startup volume is a Fusion Drive or a software RAID, you can’t start in safe mode. In that case, ask for instructions.

Hi, I also have issue with my iMac after the same update. Magic mouse does not scroll and is sluggish. Other applications are slow, as if there is not enough memory. Please could you help?