Bring macOS documentation up-to-date with respect to the new semantic color systemPlaceholderTextColor.

1 files changed, 12 insertions, 11 deletions

diff --git a/macosx/README b/macosx/README
index a3f10b6..e9d50a4 100644
--- a/macosx/README
+++ b/macosx/README
@@ -275,17 +275,18 @@ but rather refers to the context in which the color should be used.
 Tk now provides the following semantic colors as system colors:
 systemTextColor, systemTextBackgroundColor, systemSelectedTextColor,
 systemSelectedTextBackgroundColor, systemControlTextColor,
-systemDisabledControlTextColor, systemLabelColor, systemLinkColor, and
-systemControlAccentColor.  All of these except the last three were
-present in OSX 10.0 (and those three are simulated in systems where they
-do not exist).  The change in 10.14 was that the RGB color value of
-these colors became dynamic, meaning that the color value can change
-when the application appearance changes.  In particular, when a user
-selects Dark Mode in the system preferences these colors change
-appearance.  For example systemTextColor is dark in Aqua and light in
-DarkAqua.  One additional color, systemSelectedTabTextColor, does not
-exist in macOS but is used by Tk to match the different colors used
-for Notebook tab text in different OS versions.
+systemDisabledControlTextColor, systemLabelColor, systemLinkColor,
+systemControlAccentColor, and systemPlaceholderTextColor.  All of these
+except the last four were present in OSX 10.0 (and those four are
+simulated in systems where they do not exist).  The change in 10.14 was
+that the RGB color value of these colors became dynamic, meaning that
+the color value can change when the application appearance changes.
+In particular, when a user selects Dark Mode in the system preferences
+these colors change appearance.  For example systemTextColor is dark in
+Aqua and light in DarkAqua.  One additional color,
+systemSelectedTabTextColor, does not exist in macOS but is used by Tk
+to match the different colors used for Notebook tab text in different
+OS versions.
 
 The default background and foreground colors of most of the Tk widgets
 have been set to semantic colors, which means that the widgets will change