#zip64

OSX Snow Leopard has a command line zip/unzip utility...

Today I needed to unzip a MASSIVE (10GB) zip file (for Adobe LiveCycle - but that's another story)... and got this response:

unzip LiveCycleES2.5-0.0.5.zip Archive: LiveCycleES2.5-0.0.5.zip skipping: LiveCycleES2.5-0.0.5/LiveCycleES2.5.x86_64-0.0.5.vmdk need PK compat. v4.5 (can do v2.1) creating: LiveCycleES2.5-0.0.5/ inflating: LiveCycleES2.5-0.0.5/LiveCycleES2.5.x86_64-0.0.5.vmx

So what's PK compat. v4.5 ? The standard zip libraries don't let you unzip really big files. The PKZip libraries have evolved with myriad different versions and capabilities - including (in 4.5) the addition of Zip64 - with support for huge (>4.5 GB) files.

To get it to work, we need p7zip the Linux/Unix port of the 7-zip libraries.

I use homebrew - and you should too.

brew install p7zip

then use the 7z utility (with a magic 'x' for extract like so:

7z x LiveCycleES2.5-0.0.5.zip