Option to show sidebar in Photos on Mac is greyed out.
In the View menu, the option to show the sidebar in the Photos app is greyed out. I have closed, forced closed, restarted the Mac, you name it and still unable to get to not be greyed out. Works fine on my other Macs, just not this one. Any ideas?
iMac (27-inch, Late 2013), OS X Yosemite (10.10.4)