I was getting the Error Code -36, on a Mac Mini with an external multi-drive, running OS10.10.4, following the suggestions on this site, I spoke to the tech support, who suggested (and emailed me) a series of fixes to try before hanging up. Instead of doing those, I simply copied (by dragging it) the software that came with my disk (TurboTax Basic) onto my desktop and them moved it from there to the applications folder, then ran it and installed the update. No more error -36. No other problems. I would suggest everyone try this first before calling tech support, it could save you some time.
