![]() Select Reinstall OS X from the Utilities menu, and click on the Continue button. Reinstall Yosemite: Reboot from the Recovery HD. Wait until the operation completes, then quit DU and return to the main menu. If no errors are reported click on the Repair Permissions button. ![]() If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If it does not say "Verified" then the hard drive is failing or failed. In the DU status area you will see an entry for the S.M.A.R.T. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. When the recovery menu appears select Disk Utility. Repair the Hard Drive and Permissions as follows. Repair the Hard Drive and Permissions: Upon startup select Disk Utility from the Utilities menu. Select the Recovery HD and click on the downward pointing arrow button.ģ. ![]() Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. If this doesn't help, then:īoot to the Recovery HD: Restart the computer and after the chime press and hold down the COMMAND and R keys until the Utilities menu screen appears. Restart the computer in Safe Mode, then restart again, normally. Intel-based Macs: Resetting the System Management Controller (SMC)Ģ. Try these in order testing your system after each to see if it's back to normal:ġ. However, if you are unwilling to do that then: I suggest you take it in for service since it's new and in warranty.
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