51.7z -

Try the easiest tool to keep your Mac flawless. Free up a ton of space, block malware, and say goodbye to lag. Keep your Mac ready for anything with CleanMyMac.

Try 7 Days Free Buy Now

- day money back guarantee

Notarized by Apple
29 million downloads
4.9 rating
758 "Excellent" reviews
Years of Mac expertise
(2008-2025)
iF Design Award

360° Mac optimization

Average monthly results with CleanMyMac

Junk cleaned

35M GBs
Threats removed

328K
Speed improvements

9.8M

Clean up your Mac, getting space back

Crush the biggest chunk of unneeded system files, hidden clutter, broken downloads and 20 more types of junk. Get the extra space for the things that matter.

Try 7 Days Free

Speed up your Mac like it’s brand-new

Disable unnecessary background applications and apps that open automatically on system launch. Don’t let performance drops slow your productivity down.

Manage apps seamlessly

A single hub for full application management. Remove apps, along with their leftovers, and stay on top of every crucial update.

Remove
malware before it’s too late

Detect 99% of malicious software with our proprietary anti-malware engine. Run a Quick, Normal, or a Deep level scan to keep tabs on your privacy and control application permissions easily.

Clear cloud storage

Paying for cloud storage you barely use? Cloud Cleanup shows what’s filling up your cloud accounts, letting you free up room in just a few taps.

Find duplicate files and sort them out

Delete duplicates that are eating up precious space. Detect tons of similar images and sort through downloaded files, taking care of them just the way you want.

Visualize Mac hard drive

Build an interactive map of your entire drive and view folders sorted by size. Let Space Lens find the biggest chunks of clutter, so you can tidy up with ease.

These Mac users think it rocks

: In a different context, "51.7z" appears as a file extension (e.g., stb #51.7z.001 ) for archived recordings of Strike Witches (Stove Radio) , a Japanese radio show featuring voice actresses from the Strike Witches anime series.

: There was a specific French company named ACCESS STORY (located in Paris) that was registered under this 51.7Z activity code. The business was established in June 1994 but closed down on December 31, 1996.

: The string "51.7z" is also found in version-specific file names for tools like ShiroExploit , a security tool used for identifying vulnerabilities in Apache Shiro. Société ACCESS STORY à 75019 PARIS - SIREN 395 263 858