I don't get Core as a choice (Mac/Chrome)
works for me on Chrome for Mac
go to Profile > Modify > Look & Layout > Current Theme and click change
MacBook Pro with Retina Display (Core i7 2.7 GHz, 16gb RAM, 750gb SSD HD)
Power Mac G5 Dual 2.0 GHz, 3 gigs RAM, 1x2 TB, 1x1 TB, 2x250 gig, 2x100 gig HDs, and 1x60 gig HD, LG 19" LCD. Airport Express connection to stereo.
"The New" iPad 64gb WiFi + AT&T 4G
iPods: iPhone 4 32 gig, 3G 16 gig, 2.5G 8 gig, 20 gig (2nd gen), 80 gig ("5.5" gen, black), 1 gig shuffle (1st gen).