Problem unzipping Files on OS X

[Tina-chan]

Hi,

I was hoping someone could help with a file issue we’re experiencing on Mac.

Some of our customers have reported unzipping issues with our files, which only seems to affect Macs. The problem only occurs with our larger downloads (5GB plus).

In order to cater for both Mac and PC users we remove all the Mac files on a PC (Windows 7 Professional), zip the file on the PC and then upload them to our Amazon S3 server.

Smaller files don’t seem to cause any issues, but larger file show up with the following error on Mac:

Unable to expand “file-xyz.zip” into “Download Location” (Error 1 - Operation not permitted)

Strangely this error only seems to occur when using the in-built unzipping software, but if the file is being unzipped with ‘Unarchiver’ it works fine.

I have been told this could be caused by us zipping the file on a PC, and while we have found some software that removes Mac files from a zipped file on Mac itself, I was hoping I could get another opinion on this.

Thanks!

 

[hiddenmarkov]

If using the built in windows zip app its win zip (albeit stripped down and not the bells and whistles of the full version) and you may want to see if they have issues in the stripped down form of very large zip creations. Sounds like mixed in there is a file size limitation somewhere.

You may also have some compatibility issues. I have for downloading files for unix/Linux use seen where they recommend the files are downloaded by a Linux based system to be used on Linux based system. I have never had issues here but I gather if they bothered to put this statement in if even just a cover your own butt step, something may have come in the past to warrant the covering their butt basically.

Is looking at buying 3rd zippers an option? At least to test?


Reason asking is win zip (in its windows format or even full blown) is not, IMO, the best app out there. I like others implementations tbh. They use, imo, better algorithms. For your 5 gb zip file generation I'd recommend if possible trialing some other options and look at time to generate files and resultant size of the zip created. One that avoids proprietary formats probably would be ideal for your needs. I like Rar but can be proprietary. And in the case of mac os a command line app (I can work CLI...but would be not be complaining if they gave us GUI interface one day).