When I check the installed security updates through "system information" on Yosemite. Security update 2015-001 Security update 2015-002 Security update 2015-004 Security update 2015-006 Security update 2016-001 Security update 2016-002 Security update 2016-003 Security update 2016-004 Security update 2016-005 The missing updates Security update 2015-003 and 2015-005 are missing. I have tried to install manual but get an error can't install which I believe is because it is designed to install on a pre version of 10.10.5. But the problem is that specific update has not been installed. Is their any way to install ? Can i confirm its security patch is installed? I will be reinstalling my operating system if no resolution as this appears to be a hack designed to omit existing security updates.