diff --git a/plugins/python-build/share/python-build/patches/3.5.10/Python-3.5.10/0005-BPO-41100-Support-macOS-11-when-building-GH-21113.patch b/plugins/python-build/share/python-build/patches/3.5.10/Python-3.5.10/0005-BPO-41100-Support-macOS-11-when-building-GH-21113.patch
new file mode 100644
index 00000000..9d48c81d
--- /dev/null
+++ b/plugins/python-build/share/python-build/patches/3.5.10/Python-3.5.10/0005-BPO-41100-Support-macOS-11-when-building-GH-21113.patch
@@ -0,0 +1,48 @@
+From 8ea6353f60625c96ce96588c70ff24a77f8c71f9 Mon Sep 17 00:00:00 2001
+From: Ronald Oussoren <ronaldoussoren@mac.com>
+Date: Thu, 25 Jun 2020 16:55:48 +0200
+Subject: [PATCH] BPO-41100: Support macOS 11 when building (GH-21113)
+
+---
+ Misc/NEWS.d/next/macOS/2020-06-24-13-51-57.bpo-41100.mcHdc5.rst | 1 +
+ configure                                                       | 2 +-
+ configure.ac                                                    | 2 +-
+ 3 files changed, 3 insertions(+), 2 deletions(-)
+ create mode 100644 Misc/NEWS.d/next/macOS/2020-06-24-13-51-57.bpo-41100.mcHdc5.rst
+
+diff --git a/Misc/NEWS.d/next/macOS/2020-06-24-13-51-57.bpo-41100.mcHdc5.rst b/Misc/NEWS.d/next/macOS/2020-06-24-13-51-57.bpo-41100.mcHdc5.rst
+new file mode 100644
+index 0000000000..ded66b567a
+--- /dev/null
++++ b/Misc/NEWS.d/next/macOS/2020-06-24-13-51-57.bpo-41100.mcHdc5.rst
+@@ -0,0 +1 @@
++Support macOS 11 when building.
+diff --git a/configure b/configure
+index c51f396824..5024860ca4 100755
+--- a/configure
++++ b/configure
+@@ -3375,7 +3375,7 @@ $as_echo "#define _BSD_SOURCE 1" >>confdefs.h
+   # has no effect, don't bother defining them
+   Darwin/[6789].*)
+     define_xopen_source=no;;
+-  Darwin/1[0-9].*)
++  Darwin/[12][0-9].*)
+     define_xopen_source=no;;
+   # On AIX 4 and 5.1, mbstate_t is defined only when _XOPEN_SOURCE == 500 but
+   # used in wcsnrtombs() and mbsnrtowcs() even if _XOPEN_SOURCE is not defined
+diff --git a/configure.ac b/configure.ac
+index 70deefb6b9..5a3e340aa3 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -495,7 +495,7 @@ case $ac_sys_system/$ac_sys_release in
+   # has no effect, don't bother defining them
+   Darwin/@<:@6789@:>@.*)
+     define_xopen_source=no;;
+-  Darwin/1@<:@0-9@:>@.*)
++  Darwin/@<:@[12]@:>@@<:@0-9@:>@.*)
+     define_xopen_source=no;;
+   # On AIX 4 and 5.1, mbstate_t is defined only when _XOPEN_SOURCE == 500 but
+   # used in wcsnrtombs() and mbsnrtowcs() even if _XOPEN_SOURCE is not defined
+-- 
+2.30.1 (Apple Git-130)
+
diff --git a/plugins/python-build/share/python-build/patches/3.5.10/Python-3.5.10/0006-bpo-41100-fix-_decimal-for-arm64-Mac-OS-GH-21228.patch b/plugins/python-build/share/python-build/patches/3.5.10/Python-3.5.10/0006-bpo-41100-fix-_decimal-for-arm64-Mac-OS-GH-21228.patch
new file mode 100644
index 00000000..12022a4f
--- /dev/null
+++ b/plugins/python-build/share/python-build/patches/3.5.10/Python-3.5.10/0006-bpo-41100-fix-_decimal-for-arm64-Mac-OS-GH-21228.patch
@@ -0,0 +1,37 @@
+From 604d95e235d86465b8c17f02095edcaf18464d4c Mon Sep 17 00:00:00 2001
+From: Lawrence D'Anna <64555057+lawrence-danna-apple@users.noreply.github.com>
+Date: Tue, 30 Jun 2020 02:15:46 -0700
+Subject: [PATCH] bpo-41100: fix _decimal for arm64 Mac OS (GH-21228)
+
+Patch by Lawrence Danna.
+---
+ .../Core and Builtins/2020-06-30-04-44-29.bpo-41100.PJwA6F.rst | 1 +
+ Modules/_decimal/libmpdec/mpdecimal.h                          | 3 +++
+ 2 files changed, 4 insertions(+)
+ create mode 100644 Misc/NEWS.d/next/Core and Builtins/2020-06-30-04-44-29.bpo-41100.PJwA6F.rst
+
+diff --git a/Misc/NEWS.d/next/Core and Builtins/2020-06-30-04-44-29.bpo-41100.PJwA6F.rst b/Misc/NEWS.d/next/Core and Builtins/2020-06-30-04-44-29.bpo-41100.PJwA6F.rst
+new file mode 100644
+index 0000000000..d6176d69f0
+--- /dev/null
++++ b/Misc/NEWS.d/next/Core and Builtins/2020-06-30-04-44-29.bpo-41100.PJwA6F.rst	
+@@ -0,0 +1 @@
++add arm64 to the allowable Mac OS arches in mpdecimal.h
+\ No newline at end of file
+diff --git a/Modules/_decimal/libmpdec/mpdecimal.h b/Modules/_decimal/libmpdec/mpdecimal.h
+index 108b76efa8..35ce429f60 100644
+--- a/Modules/_decimal/libmpdec/mpdecimal.h
++++ b/Modules/_decimal/libmpdec/mpdecimal.h
+@@ -135,6 +135,9 @@ const char *mpd_version(void);
+   #elif defined(__x86_64__)
+     #define CONFIG_64
+     #define ASM
++  #elif defined(__arm64__)
++    #define CONFIG_64
++    #define ANSI
+   #else
+     #error "unknown architecture for universal build."
+   #endif
+-- 
+2.30.1 (Apple Git-130)
+