SMARTReporter is a Mac program designed to identify impending disk failures before they actually happen. Mac users interested in Os x check disk tool generally download: SMARTReporter 3.1. Let me show you how to check and repair the errors on a disk drive. How to check disk for errors in Mac OS X Errors on the hard disk on your Mac OS X computer can be the cause why the computer doesn't run as fast as it used to. See alsoErase and reformat a storage device in Disk Utility on MacAdd, delete or erase APFS volumes in Disk Utility on MacPartition a physical disk in Disk Utility on Mac Check Disk For Mac Os X 10.8 For information about servicing your Mac, see Find out how to service or repair your Mac. If you continue to have problems with your disk or it can’t be repaired, it may be physically damaged and need to be replaced. If your Mac has a Fusion Drive and you see a flashing question mark or alert, see the troubleshooting section of the Apple Support article About Fusion Drive, a storage option for some Mac computers.

If that doesn’t work, back up as much of your data as possible, reformat the disk, reinstall macOS, then restore your backed-up data. If Disk Utility can’t repair your disk, or you receive a report that the First Aid process failed, try to repair the disk or partition again. If it contains information you need, open it and examine its data to make sure it hasn’t been corrupted. If you can replace a file or recreate it, delete it.

Most of the files in the list have aliases in a DamagedFiles folder at the top level of your disk. You need to check each file in the list of affected files. If Disk Utility reports “overlapped extent allocation” errors, two or more files occupy the same space on your disk, and at least one of them is likely to be corrupted. Otherwise, you may need to do one of the following. You can click Show Details to see more information about the repairs. If Disk Utility reports that the disk appears to be OK or has been repaired, you’ve finished. If Disk Utility tells you the disk is about to fail, back up your data and replace the disk - you can’t repair it. In the sidebar, select a disk or volume, then click the First Aid button. If you check your startup volume (Macintosh HD), make sure you also check your data volume (Macintosh HD - Data). Note: If you’re checking your startup disk or startup volume, restart your computer in macOS Recovery, select Disk Utility in the macOS Utilities window, then click Continue.

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