Sad to see this, but when you're depending on for profit companies to protect human rights, you've already lost. This is an area for the U.S. government to do things with - really back 30 years ago before we allowed Chinese manufactured goods access to the U.S. market (to power up the Chinese economy and its authoritarian government). Hong Kong is in a sad place with no foreseeable exit, I'm quite surprised the Chinese government hasn't brought the army in at this point. The U.S. government should grant immigration to all the HK'ers that want to come here...spread out over some years of course. The current U.S. administration would never do this, JMHO.
As for Apple, bummer move, however the Chinese govt controls ~30% of their world marketshare - if Mr. Cook had taken a big stand and China locked them out of the market (which they'd do), after the following stock collapse, Mr. Cook would be replaced by a CEO who would do what China wants (and Apple's stock would go back up). Simple as that.