Lightroom 6 will require users to have computers runniung 64 bit operation systems (Windows or Mac OS). Those user with a 32-bit operating system will not be able to run LR 6.
Lightrrom 5 can still be used on older computers
More info in the following links.
PhotoFocus
Lightroom Journal
Charlie
Lightrrom 5 can still be used on older computers
More info in the following links.
PhotoFocus
Lightroom Journal
Charlie