How to unzip file on Macbook pro

Hello

I'm trying to decompress a downloaded file (Korg keyboard firmware update). I open the file downloaded with the finder, click on the zipped file and one), select "Open with archive utility" or b), double-click the zipped file. in both cases, the file is recognized and begins to unzip and then an error message appears: "unable to expand (1 operation not permitted error)."

Forbidding to me after ' £ooo on mac gear, I would be eternally grateful if someone could give advice how to perform a simple operation but as a file downloaded from the internet on a Macbook Pro, Yosemite 10.10.02 running.

I really hope that there is already enough mac software somewhere to do!

Thanks in advance for anyone who is kind enough to help. JM

Kronos provide firmware for Mac as a dmg, firmware for Windows file is provided in the zip file.

Download the Mac dmg file.

Tags: Mac OS & System Software

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