PL2303 USB to Serial Driver for Mac OS X

I am not able to see the video of these tutorials. If I could it is really a good job

Thank you, thank you a million times. You can't imagine how critical continued support of this project is to my software and my livelihood. Keep up the good work, and kudos.

great software with big set of manufacturers

Here's a project that builds out-of-the-box on 10.7: https://github.com/hugovincent/osx-pl2303 (Adapt the load script if your output isn't in build/Release. Right click on the target .kext to "show in Finder", to see where it ended up.)

This project seems to be rather dormant but with the advice in the review of Felix J. Ogris I was able to get the code compiled and load the kernel extension (with kextutil, the installation instructions are outdated). There are 2 more things which needs to be fixed - LLVM complains about the goto Fail statement in nl_bjaelectronics_driver_PL2303::start so the OSNumber * release definition must be moved to the start of the function and the function prototypes initialPowerStateForDomainState(), setPowerStat() have to be commented out in the header file otherwise the kext will not load. In the end it works with the ATEN adapter. Anyhow, it would be good if the maintainer could wake up and fix the code for OS X 10.7.x or someone forked the project (it's GPL after all) and do the fixing.