OS X 10.10.5 Update and Nvida GTX 750
I use Nvidia gtx 750 graphics. When I updated to 10.10.4, there was no way to enter the graphics mode, even in safe boot. I had to remove my ssd-boot drive to another computer with a lower version graphics card (Nvidia 610), download the alternate drive (as posted), install the web driver for 10.10.4, then transfer the ssd HD back to my desktop and reboot in safe mode to activate the web driver.
Since we need new drivers for 10.10.5, I suppose the procedure will have to be the same. Now, if yo don't have another computer to run to, I guess you will need to install the nvidia alternate driver for 10.10.5 prior to the update to OSX Yosemite 10.10.5.
All this caused so much hassle I decided not to try the new OSX update yet. I lost 3 days trying to figure out what was preventing the correct boot into OSX. Now it works perfectly.
Hope this helps.
Kudos, TonyMacx86 for your excellent posts!
TheJuke
Sandybridge Intel i5, 16gb memory, WD 2tb HDD
GTX 750 graphics card