diff --git a/plugins/python-build/share/python-build/3.12.15 b/plugins/python-build/share/python-build/3.12.15
new file mode 100644
index 00000000..6e77f88b
--- /dev/null
+++ b/plugins/python-build/share/python-build/3.12.15
@@ -0,0 +1,11 @@
+prefer_openssl3
+export PYTHON_BUILD_CONFIGURE_WITH_OPENSSL=1
+export PYTHON_BUILD_CONFIGURE_WITH_OPENSSL_RPATH=1
+export PYTHON_BUILD_TCLTK_USE_PKGCONFIG=1
+install_package "openssl-3.6.5" "https://github.com/openssl/openssl/releases/download/openssl-3.6.5/openssl-3.6.5.tar.gz#a2157c2830efdec3788939b00c9b0638306d3f0bbb76dc4832ee503bb397df98" mac_openssl --if has_broken_mac_openssl
+install_package "readline-8.3" "https://ftpmirror.gnu.org/readline/readline-8.3.tar.gz#fe5383204467828cd495ee8d1d3c037a7eba1389c22bc6a041f627976f9061cc" mac_readline --if has_broken_mac_readline
+if has_tar_xz_support; then
+    install_package "Python-3.12.15" "https://www.python.org/ftp/python/3.12.15/Python-3.12.15.tar.xz#c2c4321961fab0fb999d66e0cecf521c2ab3994c7992873ea99e306c1094fd5a" standard verify_py312 copy_python_gdb ensurepip
+else
+    install_package "Python-3.12.15" "https://www.python.org/ftp/python/3.12.15/Python-3.12.15.tgz#de1a241a519e0a3374fea98988d0b52c886743f9d953f23be8269cc7b59c5fab" standard verify_py312 copy_python_gdb ensurepip
+fi
diff --git a/plugins/python-build/share/python-build/3.13.16 b/plugins/python-build/share/python-build/3.13.16
new file mode 100644
index 00000000..e4a51dc7
--- /dev/null
+++ b/plugins/python-build/share/python-build/3.13.16
@@ -0,0 +1,11 @@
+prefer_openssl3
+export PYTHON_BUILD_CONFIGURE_WITH_OPENSSL=1
+export PYTHON_BUILD_CONFIGURE_WITH_OPENSSL_RPATH=1
+export PYTHON_BUILD_TCLTK_USE_PKGCONFIG=1
+install_package "openssl-3.6.5" "https://github.com/openssl/openssl/releases/download/openssl-3.6.5/openssl-3.6.5.tar.gz#a2157c2830efdec3788939b00c9b0638306d3f0bbb76dc4832ee503bb397df98" mac_openssl --if has_broken_mac_openssl
+install_package "readline-8.3" "https://ftpmirror.gnu.org/readline/readline-8.3.tar.gz#fe5383204467828cd495ee8d1d3c037a7eba1389c22bc6a041f627976f9061cc" mac_readline --if has_broken_mac_readline
+if has_tar_xz_support; then
+    install_package "Python-3.13.16" "https://www.python.org/ftp/python/3.13.16/Python-3.13.16.tar.xz#f4b1bfb3c79b5bb11b8d228a12504163b4c0dab4d679828d8f5f26b6cb6ab35d" standard verify_py313 copy_python_gdb ensurepip
+else
+    install_package "Python-3.13.16" "https://www.python.org/ftp/python/3.13.16/Python-3.13.16.tgz#cfac63bddf956deafb1172ca131ae5dcaafd6f95056086e233fca205593ed427" standard verify_py313 copy_python_gdb ensurepip
+fi
diff --git a/plugins/python-build/share/python-build/3.13.16t b/plugins/python-build/share/python-build/3.13.16t
new file mode 100644
index 00000000..518be93e
--- /dev/null
+++ b/plugins/python-build/share/python-build/3.13.16t
@@ -0,0 +1,2 @@
+export PYTHON_BUILD_FREE_THREADING=1
+source "${BASH_SOURCE[0]%t}"
diff --git a/plugins/python-build/share/python-build/patches/3.12.15/Python-3.12.15/0001-downstream-3.12-gh-153711-Avoid-use-of-dup3-and-pipe.patch b/plugins/python-build/share/python-build/patches/3.12.15/Python-3.12.15/0001-downstream-3.12-gh-153711-Avoid-use-of-dup3-and-pipe.patch
new file mode 100644
index 00000000..da0fc05e
--- /dev/null
+++ b/plugins/python-build/share/python-build/patches/3.12.15/Python-3.12.15/0001-downstream-3.12-gh-153711-Avoid-use-of-dup3-and-pipe.patch
@@ -0,0 +1,119 @@
+From ac12d63bf188f9497f8453c0447b9bc599acbf22 Mon Sep 17 00:00:00 2001
+From: Ned Deily <nad@python.org>
+Date: Wed, 5 Aug 2026 10:30:17 +0300
+Subject: [PATCH] (downstream) [3.12] gh-153711: Avoid use of dup3 and pipe2
+ calls introduced in macOS 27 (#155211)
+
+---
+ ...-08-05-02-02-33.gh-issue-153711.pO9fFb.rst |  3 ++
+ configure                                     | 33 +++++++++++--------
+ configure.ac                                  | 11 +++++--
+ 3 files changed, 32 insertions(+), 15 deletions(-)
+ create mode 100644 Misc/NEWS.d/next/macOS/2026-08-05-02-02-33.gh-issue-153711.pO9fFb.rst
+
+diff --git a/Misc/NEWS.d/next/macOS/2026-08-05-02-02-33.gh-issue-153711.pO9fFb.rst b/Misc/NEWS.d/next/macOS/2026-08-05-02-02-33.gh-issue-153711.pO9fFb.rst
+new file mode 100644
+index 00000000000..90804c179a4
+--- /dev/null
++++ b/Misc/NEWS.d/next/macOS/2026-08-05-02-02-33.gh-issue-153711.pO9fFb.rst
+@@ -0,0 +1,3 @@
++On macOS, do not attempt to use the :manpage:`dup3(2)` and
++:manpage:`pipe2(2)` system calls introduced in
++macOS 27 to prevent problems when running on older systems.
+diff --git a/configure b/configure
+index b6f90bcd8c7..b93aab935ce 100755
+--- a/configure
++++ b/configure
+@@ -17552,13 +17552,7 @@ fi
+ ac_fn_c_check_func "$LINENO" "dup" "ac_cv_func_dup"
+ if test "x$ac_cv_func_dup" = xyes
+ then :
+-  printf "%s\n" "#define HAVE_DUP 1" >>confdefs.h
+-
+-fi
+-ac_fn_c_check_func "$LINENO" "dup3" "ac_cv_func_dup3"
+-if test "x$ac_cv_func_dup3" = xyes
+-then :
+-  printf "%s\n" "#define HAVE_DUP3 1" >>confdefs.h
++  printf '%s\n' "#define HAVE_DUP 1" >>confdefs.h
+ 
+ fi
+ ac_fn_c_check_func "$LINENO" "execv" "ac_cv_func_execv"
+@@ -18028,12 +18022,6 @@ if test "x$ac_cv_func_pipe" = xyes
+ then :
+   printf "%s\n" "#define HAVE_PIPE 1" >>confdefs.h
+ 
+-fi
+-ac_fn_c_check_func "$LINENO" "pipe2" "ac_cv_func_pipe2"
+-if test "x$ac_cv_func_pipe2" = xyes
+-then :
+-  printf "%s\n" "#define HAVE_PIPE2 1" >>confdefs.h
+-
+ fi
+ ac_fn_c_check_func "$LINENO" "plock" "ac_cv_func_plock"
+ if test "x$ac_cv_func_plock" = xyes
+@@ -18608,6 +18596,25 @@ fi
+ 
+ fi
+ 
++# macOS introduced dup3 and pipe2 in macOS 27, late in the
++# lifetime of this version of Python. Rather than adding weaklinking
++# support for them, just continue to ignore them.
++if test "$ac_sys_system" != "Darwin"; then
++  ac_fn_c_check_func "$LINENO" "dup3" "ac_cv_func_dup3"
++if test "x$ac_cv_func_dup3" = xyes
++then :
++  printf '%s\n' "#define HAVE_DUP3 1" >>confdefs.h
++
++fi
++ac_fn_c_check_func "$LINENO" "pipe2" "ac_cv_func_pipe2"
++if test "x$ac_cv_func_pipe2" = xyes
++then :
++  printf '%s\n' "#define HAVE_PIPE2 1" >>confdefs.h
++
++fi
++
++fi
++
+ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CC options needed to detect all undeclared functions" >&5
+ printf %s "checking for $CC options needed to detect all undeclared functions... " >&6; }
+ if test ${ac_cv_c_undeclared_builtin_options+y}
+diff --git a/configure.ac b/configure.ac
+index ba768aea930..92049fb2889 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -4860,7 +4860,7 @@ fi
+ # checks for library functions
+ AC_CHECK_FUNCS([ \
+   accept4 alarm bind_textdomain_codeset chmod chown clock close_range confstr \
+-  copy_file_range ctermid dup dup3 execv explicit_bzero explicit_memset \
++  copy_file_range ctermid dup execv explicit_bzero explicit_memset \
+   faccessat fchmod fchmodat fchown fchownat fdopendir fdwalk fexecve \
+   fork fork1 fpathconf fstatat ftime ftruncate futimens futimes futimesat \
+   gai_strerror getegid getentropy geteuid getgid getgrgid getgrgid_r \
+@@ -4870,7 +4870,7 @@ AC_CHECK_FUNCS([ \
+   getspnam getuid getwd if_nameindex initgroups kill killpg lchown linkat \
+   lockf lstat lutimes madvise mbrtowc memrchr mkdirat mkfifo mkfifoat \
+   mknod mknodat mktime mmap mremap nice openat opendir pathconf pause pipe \
+-  pipe2 plock poll posix_fadvise posix_fallocate posix_spawn posix_spawnp \
++  plock poll posix_fadvise posix_fallocate posix_spawn posix_spawnp \
+   pread preadv preadv2 pthread_condattr_setclock pthread_init pthread_kill \
+   pwrite pwritev pwritev2 readlink readlinkat readv realpath renameat \
+   rtpSpawn sched_get_priority_max sched_rr_get_interval sched_setaffinity \
+@@ -4892,6 +4892,13 @@ if test "$MACHDEP" != linux; then
+   AC_CHECK_FUNCS([lchmod])
+ fi
+ 
++# macOS introduced dup3 and pipe2 in macOS 27, late in the
++# lifetime of this version of Python. Rather than adding weaklinking
++# support for them, just continue to ignore them.
++if test "$ac_sys_system" != "Darwin"; then
++  AC_CHECK_FUNCS([dup3 pipe2])
++fi
++
+ AC_CHECK_DECL([dirfd],
+               [AC_DEFINE([HAVE_DIRFD], [1],
+                          [Define if you have the 'dirfd' function or macro.])],
+-- 
+2.55.0.windows.3
+