App store won't install it..nor the individual download and install.
Even though I have 10.10.2...it says I do not meet the requirements.
I checked the info here:
Apple security updates - Apple Support
Nothing about computers that would not meet the requirement.
Server-OTHER, OS X Yosemite (10.10.2)
If you don't already have a current backup, back up all data, then reinstall the OS.* You don't need to erase the startup volume, and you won't need the backup unless something goes wrong. If the system was upgraded from an older version of OS X, you may need the Apple ID and password you used.
There are ways to back up a computer that isn't fully functional. Ask if you need guidance.
If you installed the Java runtime distributed by Apple and still need it, you'll have to reinstall it. The same goes for Xcode. All other data will be preserved.
*The linked support article refers to OS X 10.10 ("Yosemite"), but the procedure is the same for OS X 10.7 ("Lion") and later.
Unable to install Security Update 2015-003
