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Changes between Initial Version and Version 1 of Ticket #9421, comment 4

initial	v1
1	1	We should put some javascript in the download page that checks the macOS version and if it is 10.15 or older says their machine is too old for the daily build to run, that it requires 11.0 or newer, and leaves the daily build table blank (but still with "other releases" disclosure triangle). And we should do the same for the production release when 1.7 comes out and does not support 10.15.
	2
	3	Investigation reveals it is not possible to determine the macOS version number in a web page. Unfortunately when macOS when from 10.15 to 11 Apple tried changing the user agent string to 11_0_0 and it broke many web sites that expected 10_X_Y, so Apple decided to cap the user agent version number at 10_15_7 and that is what it has reported ever since. Also FireFox and Chrome followed suite and cap the macOS version at 10_15_7 in the user agent. So it is not possible to tell if the user has macOS 10_15_7 or 11 or newer.