I am having the same problem as brandyu
I've always been able to watch xfinity on my Macbook laptop and suddenly it isn't working and I'm getting the same messages that brandyu has reported... "site can't be reached" ERR_SPDY_INADEQUATE_TRANSPORT_SECURITY
Tried all the usual... reset router, browser, etc. I thought perhaps it was browser related, so I have tried 3 differnt browsers including Chrome and Firefox. Wondering if something has changed and xfinity may no longer be supporting my Operating System. I'm maxed out and can no longer upgrade my OS any higher. Running OS 10.7.5
Has anybody figured this out?
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