id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	blockedby	blocking	notify_on_close	platform	project
7633	Should we drop macOS 10.14 for the ChimeraX 1.5 release?	Tom Goddard	Tom Goddard	"We have one trouble with macOS 10.14 where distribution would be simplified if we required macOS 10.15.  The dmg file format that the Mac ChimeraX is distributed in has improved compression (LZMA) in macOS 10.15 over 10.14 (zlib) resulting in large file size reduction (400 MB down to 250 MB).

We could provide a separate macOS 10.14 Intel Mac dmg.  The Safari browser reports when the OS is 10.14 so we can present that dmg when appropriate.

We plan to have universal, arm and intel Mac builds for ChimeraX 1.5.  We could make just the Intel dmg use 10.14 compression.

When a newer dmg with LZMA compression is opened on macOS 10.14 it gives a somewhat cryptic error message that the compression format is not supported.  So we want to avoid macOS 10.14 users getting dmg files with newer compression.

Our download page says that ChimeraX 1.4 is the last release on macOS 10.14.  So we have given fair warning if we decide to drop it.

We should see how many ChimeraX users are using macOS 10.14 by looking at our web server logs and possibly at the ChimeraX trac tickets."	task	closed	moderate	1.5	Platform		fixed		chimerax-programmers				all	ChimeraX