RC24 and RC48 installer defaults for incorrect system with error message as part of K9U, these both are supposed to be supported on OS 10.6, but the installer gives an error message saying it requires OS 10.7. after manually installing, which i have had to do for several NI products lately, including the maschine expansion packs for 1.82 which also is supported under OS 10.6. to install them, one has to unpack the installers using an app called Pacifist or manually on the terminal using sudo xar -x -f. both methods preserve the permissions. after unpacking (expanding), place the plug-ins or packs in their respective locations ( /library/audio/plug-ins/vst or /library/audio/plug-ins/components, for libraries or packs to /users/shared. then from the service center folder of the place the RC24.xml and RC.xml ( the same xml files from any extracted pack ) to /Library/Application Support/Native Instruments/Service Center. in you /Library/Preferences folder there should be 2 files called RC24.plist and RC48.plist already (k9u) installs these, if not you can make them from an existing plist files by duplicating correcting the info respectively: for the lines Content Directory, just edit the product name to RC24 or RC48. for the install directory, for the same ( it will read like this: yourdrivename:Applications:Native Instruments:RC 24: . if you are duplicating one, remove the sn, key and system lines so the service center can create these when you authorize it. save the file with the name of the product, product.plist. this method will work with any supposed supported or unsupported NI product in OS 10.6. so far, everything, even machine 2.0 will run in os 10.6, though maschine 2 is more difficult to get running as it is not compatible with the 10.6 NI hardware drivers and requires you to reconfig system files and maschine 2. i am not sure why this is done, "pulling an apple", and creating the unnecessary need to force a computer ungrade, which in the case of an apple product can be quite expensive and take resources that might be spent on other NI products. all NI products will run on any intel mac running os 10.5 it they are not flagged to prevent installs or run. it does not make any sense that you would make a product run on a single core slow macbook air but not run on a 12 core xeon. it is recommended to run all audio as 32 bit at this time unless you are using insanely long samples that take days to play through. 64 bit just permits one to exceed the 4G memory limitation but takes more cpu power due to the increase of data, meaning a hotter cpu and slower bus speeds. we do not need more computer waste in the land fills, while the very nature of capitalism requires, like a pyramid scheme, an ever expanding base to support the gold top, this system of self interest can only fail when the resources are no longer available to support the population growth and the golden top grows too heavy and the lower bricks of sand collapse. it is time for a change, and to do so does not just require that of ecology, but as well that of economics and politics. be part of it.