What is the status of Sage on OS X 10.11 (El Capitan)?
The binary page for OS X says that Sagemath doesn't work on OS X 10.11, then lists a workaround that involves temporarily disabling System Integrity Protection. The trac page for the problem, #19370, lists the problem as "fixed". What's the correct status? Is the "fix" just to disable SIP? And is this necessary to run Sagemath itself or just the installer?