commit 5c5132f68119cfd289e27e7bd20a0bd34c5a0ca2
Author:     ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
AuthorDate: Sat Sep 19 21:59:09 2020 +0200
Commit:     ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
CommitDate: Sat Sep 19 21:59:25 2020 +0200

    Fix when building with SDK 10.15 and running with 11.0 Big Sur
    
    When FLTK runs under macOS "Big Sur", the OS appears as 11.0
    if FLTK was built with SDK 11.0 and as 10.16 it it was built with
    SDK 10.15.

 src/Fl_cocoa.mm | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git src/Fl_cocoa.mm src/Fl_cocoa.mm
index 8c7b4ae..260525b 100644
--- src/Fl_cocoa.mm
+++ src/Fl_cocoa.mm
@@ -2183,7 +2183,7 @@ static FLTextInputContext* fltextinputcontext_instance = nil;
 }
 #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_14
 - (void)create_aux_bitmap:(CGContextRef)gc retina:(BOOL)r {
-  if (!gc || fl_mac_os_version >= 110000) {
+  if (!gc || fl_mac_os_version >= 101600) {
     // bitmap context-related functions (e.g., CGBitmapContextGetBytesPerRow) can't be used here with macOS 11.0 "Big Sur"
     static CGColorSpaceRef cspace = CGColorSpaceCreateDeviceRGB();
     int W = [self frame].size.width, H = [self frame].size.height;
@@ -2258,7 +2258,7 @@ static FLTextInputContext* fltextinputcontext_instance = nil;
   if (window->damage()) d->Fl_Window_Driver::flush();
 #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_14
   if (destination) { // can be NULL with gl_start/gl_finish
-    if (fl_mac_os_version < 110000 && CGBitmapContextGetBytesPerRow(aux_bitmap) == CGBitmapContextGetBytesPerRow(destination)) {
+    if (fl_mac_os_version < 101600 && CGBitmapContextGetBytesPerRow(aux_bitmap) == CGBitmapContextGetBytesPerRow(destination)) {
       memcpy(CGBitmapContextGetData(destination), CGBitmapContextGetData(aux_bitmap),
              CGBitmapContextGetHeight(aux_bitmap) * CGBitmapContextGetBytesPerRow(aux_bitmap));
     } else {