diff --git a/src/macfont.h b/src/macfont.h
index 3289990..abb37cd 100644
--- a/src/macfont.h
+++ b/src/macfont.h
@@ -45,12 +45,12 @@ struct mac_glyph_layout
   CGGlyph glyph_id;
 };
 
-#if MAC_OS_X_VERSION_MAX_ALLOWED < 1080
+#if !defined (MAC_OS_X_VERSION_10_8)
 enum {
   kCTFontTraitItalic = kCTFontItalicTrait,
   kCTFontTraitBold = kCTFontBoldTrait,
   kCTFontTraitMonoSpace = kCTFontMonoSpaceTrait,
-#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1070
+#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1070 && defined (MAC_OS_X_VERSION_10_7)
   kCTFontTraitColorGlyphs = kCTFontColorGlyphsTrait
 #else
   kCTFontTraitColorGlyphs = (1 << 13)
diff --git a/src/macfont.m b/src/macfont.m
index 19145f9..91ad520 100644
--- a/src/macfont.m
+++ b/src/macfont.m
@@ -2875,7 +2875,7 @@ So we use CTFontDescriptorCreateMatchingFontDescriptor (no
                                            @selector(backingScaleFactor)])
 #endif
             CGContextSetLineWidth (context, synthetic_bold_factor * font_size
-                                   * [[FRAME_NS_VIEW(f) window] backingScaleFactor]);
+                                   * [(EmacsWindow *) [FRAME_NS_VIEW(f) window] backingScaleFactor]);
 #if MAC_OS_X_VERSION_MIN_REQUIRED < 1070
           else
 #endif
diff --git a/src/nsfns.m b/src/nsfns.m
index e19e4e2..3f20c8e 100644
--- a/src/nsfns.m
+++ b/src/nsfns.m
@@ -1592,7 +1592,7 @@ Frames are listed from topmost (first) to bottommost (last).  */)
 }
 
 #ifdef NS_IMPL_COCOA
-#if MAC_OS_X_VERSION_MAX_ALLOWED > 1090
+#if MAC_OS_X_VERSION_MAX_ALLOWED > 1090 && defined (MAC_OS_X_VERSION_10_9)
 #define MODAL_OK_RESPONSE NSModalResponseOK
 #endif
 #endif
diff --git a/src/nsterm.h b/src/nsterm.h
index a60f94e..7969a90 100644
--- a/src/nsterm.h
+++ b/src/nsterm.h
@@ -38,6 +38,35 @@ typedef CGFloat EmacsCGFloat;
 typedef float EmacsCGFloat;
 #endif
 
+/* macOS 10.7 introduces some new constants, enums and methods.
+   Forward declare them when building on macOS 10.6.  */
+#if !defined (MAC_OS_X_VERSION_10_7) && MAC_OS_X_VERSION_MAX_ALLOWED >= 1070
+#define NSFullScreenWindowMask                      (1 << 14)
+#define NSWindowCollectionBehaviorFullScreenPrimary (1 << 7)
+#define NSApplicationPresentationFullScreen         (1 << 10)
+#define NSApplicationPresentationAutoHideToolbar    (1 << 11)
+#define NSAppKitVersionNumber10_7 1138
+
+// As in https://chromium.googlesource.com/chromium/blink/+/master/Source/platform/mac/NSScrollerImpDetails.h.
+enum {
+    NSScrollerStyleLegacy = 0,
+    NSScrollerStyleOverlay = 1
+};
+typedef NSInteger NSScrollerStyle;
+
+@interface NSScroller(NSObject)
++ (CGFloat)scrollerWidthForControlSize:(NSControlSize)controlSize scrollerStyle:(NSScrollerStyle)scrollerStyle;
+@end
+
+void CTFontDrawGlyphs(CTFontRef font, const CGGlyph *glyphs, const CGPoint *positions, size_t count, CGContextRef context) __attribute__((weak_import));
+#endif
+
+#if !defined (MAC_OS_X_VERSION_10_8) && MAC_OS_X_VERSION_MAX_ALLOWED >= 1080
+extern CFArrayRef CTFontCopyDefaultCascadeListForLanguages(CTFontRef font, CFArrayRef languagePrefList) __attribute__((weak_import));
+#define kCTFontUIFontUser 0
+
+#endif
+
 /* ==========================================================================
 
    Trace support
@@ -470,6 +499,10 @@ typedef id instancetype;
 {
   NSPoint grabOffset;
 }
+#if !defined (MAC_OS_X_VERSION_10_7) && MAC_OS_X_VERSION_MAX_ALLOWED >= 1070
+- (NSRect)convertRectToScreen:(NSRect)rect;
+@property(readonly) CGFloat backingScaleFactor;
+#endif
 @end
 
 
@@ -1251,14 +1284,6 @@ extern char gnustep_base_version[];  /* version tracking */
                                 ? (min) : (((x)>(max)) ? (max) : (x)))
 #define SCREENMAXBOUND(x) (IN_BOUND (-SCREENMAX, x, SCREENMAX))
 
-/* macOS 10.7 introduces some new constants.  */
-#if !defined (MAC_OS_X_VERSION_10_7) && MAC_OS_X_VERSION_MAX_ALLOWED >= 1070
-#define NSWindowStyleMaskFullScreen                 (1 << 14)
-#define NSWindowCollectionBehaviorFullScreenPrimary (1 << 7)
-#define NSApplicationPresentationFullScreen         (1 << 10)
-#define NSApplicationPresentationAutoHideToolbar    (1 << 11)
-#endif
-
 /* macOS 10.12 deprecates a bunch of constants. */
 #if !defined (NS_IMPL_COCOA) || !defined (MAC_OS_X_VERSION_10_12)
 #define NSEventModifierFlagCommand         NSCommandKeyMask
diff --git a/src/nsterm.m b/src/nsterm.m
index 1eaf94a..e0a977b 100644
--- a/src/nsterm.m
+++ b/src/nsterm.m
@@ -6342,7 +6342,7 @@ - (NSRect)firstRectForCharacterRange: (NSRange)theRange
     {
 #endif
       rect.origin = pt;
-      rect = [[self window] convertRectToScreen: rect];
+      rect = [(EmacsWindow *) [self window] convertRectToScreen: rect];
 #if MAC_OS_X_VERSION_MIN_REQUIRED < 1070
     }
   else