How to delete free space on mac

The easier and much safer way to delete them is to use CleanMyMac , which translates those confusing folders into actual backup names so you can decide which backup you actually want to delete.

Your Startup Disk is Full on Mac OS - How to Fix It

Just check the things you want to remove, and then click the Clean button. These files often take up disk space for no good reason.

Further reading

Mac OS X tries to automatically remove temporary files, but a dedicated application will likely find more files to clean up. These caches contain files from web pages so your browser can load the web pages faster in the future.

Optimize Storage

Each browser limits its cache to a maximum amount of disk space, anyway. This will pull up a folder that has a ton of folders in it, which you can select and delete manually if you choose. You can clean up temporary files easier, and much safer, by using CleanMyMac.

Just open it up and run through a scan, and then go into the System Junk section to identify all of the cache files and other things that you can clean up.


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The thing about temporary files, of course, is that most of them are going to come back after you use your Mac for a while. So deleting temporary files is great, but only works for a while.

How to Secure Erase Free Space on Mac Drives with OS X El Capitan

You can then delete these space hogs to free up space. If you care about these files, you may want to move them to external media — for example, if you have large video files, you may want to store them on an external hard drive rather than on your Mac. Mac applications come with language files for every language they support.


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  8. However, you probably just use a single language on your Mac, so those language files are just using hundreds of megabytes of space for no good reason. You can change the Mail settings to not download attachments automatically to save space, or run a cleanup tool to get rid of them. You can run a scan, head to Mail Attachments, and see all of the attachments that can be deleted.

    Click Clean, and your hard drive will be free of them. And those folders sit there looking innocuous but taking up tons of space on your drive.

    How to securely erase free space on a hard drive (Mac)

    Once you are there, you can go through the new settings and enable the ones that make sense to you. For example, you can delete downloaded. The Best Tech Newsletter Anywhere. Join , subscribers and get a daily digest of news, comics, trivia, reviews, and more. Windows Mac iPhone Android.

    Instead of just formatting the drive, installing macOS, then handing it off, I want to make sure all the contents I had stored on it are irrecoverably erased I sometimes work on projects under NDA, and I also like having some semblance of privacy in general. Disk Utility used to expose this functionality in the UI, which made this a very simple operation.

    But it seems to have gone missing in recent macOS versions. Luckily, it's still available on the command line via Terminal. This command would write zeroes on the entire 'Macintosh HD' drive. There are a few other common options available instead of 0 if you run man diskutil and scroll down to the secureErase section. I most commonly use:. The other options are even more secure, according to brainy hardware people I also encrypt my entire drive, as well as my Time Machine backups, so I feel fairly secure regardless of what kind of erasure mode I choose.

    I figure if a government wants to hack my personal info, there are a zillion other avenues they would be more successful in hacking than a 3-pass-erasure of a secondhand SSD or hard drive that had encrypted personal data. In diskutil you have still Security Options in the Erase dialog. There is a slider from Fastest to Most Secure. Whatever that means.