Can't get beyond "Verifying PKG" on Mac

Trying to install ODrive on a second Mac. Had no issues on the first one, but on this one (2011 iMac running Yosemite), I can’t get it to install as it constantly hangs on the verifying step. Any suggestions?

I haven’t seen this before. Have you tried re-downloading already?

If so, see if you can look at the install log to identify where it might be having trouble. You can get to this from the OS X “console” utility (type “console” in spotlight search). On the right-hand sidebar, there is a /var/log section. In that section is an “install.log”