Unable to clear warnings after finding them using disk utility!

Those are possibly corrupted Time Machine snapshots. You should use the following method in the Terminal to delete the snapshots. Time Machine creates a new one about every hour anyway:

1. Launch the Terminal app from the /Applications/Utilities folder.

2. In the Terminal, type the following to list any available snapshots on your internal hard drive. As a reference, the "/" in this command means the top level of your startup drive:

tmutil listlocalsnapshots /

3. Once you see how many snapshots there are, you can use a Terminal command to reduce -- or thin -- the number of snapshots. Without parameters, the command looks like this:

thinlocalsnapshots mount_point [purge_amount] [urgency]

Now some explanations . . .

"thinlocalsnapshots" is the actual command

"mount_point" in this case refers to the top level of your internal startup drive where those snapshots are located. That is why we use just "/".

"purge_amount" signifies how much disk space you wish to reclaim, expressed in bytes. For example, the number 10000000000 represents 10 GB.

"urgency" represents the level or degree of the purge. It can be a number 1 to 4, with 4 probably meaning very urgent.

So then, if you specify both "purge_amount" and "urgency", the Time Machine Utility -- or "tmutil" -- will attempt with an urgency level of 1 to 4 -- depending on what level you choose -- to reclaim the amount you have specified in bytes by thinning available snapshots.

Now, if you do not specify an urgency level, then the default urgency level will be used.

Below is an example where we want to reclaim 10 GB of disk space using an urgency of 1. Please keep in mind that each time you run a Time Machine command like this, it will keep thinning the snapshots, until eventually, there will be none left to delete:

tmutil thinlocalsnapshots / 1000000000 1

Each time you use a command like that, the Terminal will report back to you what happened; that is, what it worked on.

On a side note, Apple claims that each snapshot will be deleted after a period of 24 hours. However, apparently, this is not always the case. You can learn more about this here:

https://support.apple.com/en-ca/HT204015

I hope that the above info has been helpful to you, and that perhaps it has even helped you to resolve your issue. Please let me know. Thanks!

ALPAPD wrote:

How do I correct these errors?

Boot into Recovery (command R on boot up) and Run Disk Utility>First Aid from there on your Macintosh HD.

If errors are found and repaired, run again until no errors reported.

Recovery http://support.apple.com/kb/HT4718

You can run Disk Utility First Aid more than once on the drive if at first, you do not get the green bill of drive health. This will not however, save your bacon if the drive is actually damaged.