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I'm looking to download an ftdi driver for OSX 10.7.2. I will be using it for work I'm doing in python 2.7.x, using pySerial.

I have no idea how to determine whether I need to download the 32 or 64-bit version. Can anyone advise how to work this out ?

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Generally, 32 bit is more compatible, especially if you're developing for potentially 32 bit clients. –  music2myear Mar 20 '13 at 20:47
    
I need to know how to check which one I should use for my system. –  jml Mar 20 '13 at 21:14
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up vote 1 down vote accepted

In Terminal.app, entering the command "uname -a" will indicate if your system is running a 32 or 64-bit kernel. A 32-bit kernel will return RELEASE_I386 i386, while a 64-bit kernel will return RELEASE_X86_64 x86_64. Your software selection should match your kernel version. Source, OSXDaily.

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Thanks for your help. Does this mean that I cannot run Python in 32-bit mode, or that all of the libraries that Python accesses need to be 64-bit? That's the one thing I'm not clear about... for ex., I know of a couple applications that allow you to set which mode they run in within their inspector (theapp.app). –  jml Mar 21 '13 at 18:55
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