Hello, I recently installed OS X Yosemite 10.10 in my old MacBook White that is unsupported with MacPostFactor 1.0.1 without any issues. Well, all is working fine unless when I try to install the 10.10.5 update from App Store I get the ''prohibited'' symbol after installing and MacBook starts up, so I have to reinstall the OS again. How can I install that update without getting any error? Is it possible at least? Thank you in advantage!