By Jesse Wienholts, 3 October, 2013 Forum macOS and Mac Apps Hi, I have lots of .b1 argives but I can not use them. Normally I use the unargiver, but that app doesn't work with .b1 files. You have to use b1 free argyver in stead, but it is inaccesible. How can i use this files? Options Log in or register to post comments