[gimp] INSTALL, NEWS: the macOS build is now officially using meson too.

[Jehan <jehanp src gnome org>]

commit 1ccdf467fb91639963a05f16469c173078e6f167
Author: Jehan <jehan girinstud io>
Date:   Sun Apr 17 15:04:44 2022 +0200

    INSTALL, NEWS: the macOS build is now officially using meson too.
    
    See MR gimp-macos-build!97.

 INSTALL.in | 19 ++++++++++---------
 NEWS       |  5 +++--
 2 files changed, 13 insertions(+), 11 deletions(-)
---
diff --git a/INSTALL.in b/INSTALL.in
index df98ce667e..5e32bb2c0e 100644
--- a/INSTALL.in
+++ b/INSTALL.in
@@ -204,11 +204,12 @@ header files installed.
 
  17. Configure GIMP by running the `configure' script. You may want
      to pass some options to it, see below.
-     Note that for Windows, we now recommend officially to build GIMP
-     with `meson` instead of `autotools` (`configure` script, make,
-     etc.). Therefore further build instructions below must be converted
-     as their meson command equivalents. On all other platforms, the
-     autotools are still recommended and more complete.
+
+     Note that for Windows and macOS, we now recommend officially to
+     build GIMP with `meson` instead of `autotools` (`configure` script,
+     make, etc.). Therefore further build instructions below must be
+     converted as their meson command equivalents. On all other
+     platforms, the autotools are still recommended and more complete.
 
  18. Build GIMP by running `make'. The use of GNU make is recommended.
      If you need to tweak the build to make it work with other flavours
@@ -301,10 +302,10 @@ compilation and installation output is not shown.
 
 Note: if building from repository (not tarballs), you may notice a meson
 build system is also available in the repository. It is not the main
-build system and is not recommended for stable packages as it still has
-several known issues, including build flag errors leading to crashes and
-missing features.
-We only invite contributors to use the meson build if they wish to help
+build system and is not recommended for stable packages other than on
+macOS and Windows, as it still has several known issues, including
+missing or broken features.
+Yet we invite contributors to use the meson build if they wish to help
 with debugging.
 
 The `configure' script examines your system, and adapts GIMP to run on
diff --git a/NEWS b/NEWS
index d0842be739..036b0d5cc7 100644
--- a/NEWS
+++ b/NEWS
@@ -140,8 +140,9 @@ Build:
   - Flatpak manifest upgraded with new version constraints so that the
     flatpak-external-data-checker does not warn wrongly on major update
     when we don't want to or can't update immediately.
-  - meson is now recommended for Windows builds and our official
-    installer is now built (still from CI) with meson.
+  - meson is now recommended for Windows and macOS builds and our
+    official installer and DMG respectively are now built (still from
+    CI) with meson.
   - Flatpak manifest improved with version constraints for dependencies
     where we should not update just yet (hence don't want new version
     notifications).