saved the day...

I had a .zip archive that would not decompress. It was 600MB plus archive (compress using finder) and I kept getting a "unable to expand (error-1 . Operation not permitted)" message using the default Mountain Lion archive utility. Tried the suggested Stuffit and Ziped apps and they too fail to decompress. Then I read on the Mac support forums to try The Unarchiver…and Voila!!! it opened. It did however, create another .zip file (same name) within the designation folder and it was this .zip that was able to decompress. Super impressed with this handy little app. It saved my day!!!

ADfab761 about The Unarchiver, v3.7