Hello, I'm the maintainer of glib2 in the MacPorts package management system.

glib 2.46.0 was recently released, and attempting to configure it produces this 
error:

checking OSX version >= 10.9.0... no
configure: error: OSX version is too old!

glib 2.45.2 and earlier worked fine on older versions of OS X, but 2.45.3 and 
later claim to require 10.9.

My understanding is that the implementation of GNotification support for OS X 
[1] necessitated this increase in minimum OS version. But this huge jump in 
minimum OS version makes glib unusable on hundreds of older Mac models [2] that 
cannot be upgraded to OS X 10.9 that were previously able to use glib. I urge 
you to reconsider this action and reinstate support for older versions of OS X 
by making the GNotification support optional. Clearly, since GNotification 
support was just added, no existing apps that used glib and that already worked 
on OS X can have required this functionality.

I originally expressed this concern in the issue tracker [1] but was advised to 
bring it up on the mailing list for discussion instead.

In response to my comment in that ticket, doubt was expressed as to the 
usability of glib on older systems, even prior to this. I can at least tell you 
that Graphviz, which uses glib, worked fine all the way back to OS X 10.4, 
which is the earliest system I tested. I'm happy to run your test suite on 
older systems and report bugs for any problems found.


[1] https://bugzilla.gnome.org/show_bug.cgi?id=747146

[2] http://www.everymac.com/systems/by_capability/maximum-macos-supported.html

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