diff --git a/.bazelrc b/.bazelrc
index 33dedb14cac..534717c2733 100644
--- a/.bazelrc
+++ b/.bazelrc
@@ -61,6 +61,18 @@ build --copt "-Wno-dangling"  --host_copt "-Wno-dangling"
 build --per_file_copt=.*external/.*@-w
 build --host_per_file_copt=.*external/.*@-w
 
+##### Platform-specific configs (auto-selected) #############
+# --enable_platform_specific_config makes bazel automatically apply
+# build:macos on macOS, build:linux on Linux, etc.
+common --enable_platform_specific_config
+
+# macOS: boost.stacktrace needs this since backtrace() doesn't require GNU source
+build:macos --copt=-DBOOST_STACKTRACE_GNU_SOURCE_NOT_REQUIRED
+build:macos --host_copt=-DBOOST_STACKTRACE_GNU_SOURCE_NOT_REQUIRED
+# Aligned allocation/deallocation for abseil is only available since 10.13
+build:macos --macos_minimum_os=10.13
+build:macos --host_macos_minimum_os=10.13
+
 # Settings for --config=asan address sanitizer build
 build:asan --strip=never
 build:asan --copt=-fsanitize=address
diff --git a/BUILD.bazel b/BUILD.bazel
index 370c9b36b75..3a69d8213df 100644
--- a/BUILD.bazel
+++ b/BUILD.bazel
@@ -7,7 +7,7 @@ load("@rules_cc//cc:cc_binary.bzl", "cc_binary")
 load("@rules_cc//cc:cc_library.bzl", "cc_library")
 load("@rules_shell//shell:sh_binary.bzl", "sh_binary")
 load("//bazel:notification.bzl", "notification_rule")
-load("//bazel:python_wrap_cc.bzl", "PYTHON_STABLE_API_DEFINE", "python_wrap_cc")
+load("//bazel:python_wrap_cc.bzl", "PYTHON_EXTENSION_LINKOPTS", "PYTHON_STABLE_API_DEFINE", "python_wrap_cc")
 load("//bazel:tcl_encode_or.bzl", "tcl_encode")
 load("//bazel:tcl_wrap_cc.bzl", "tcl_wrap_cc")
 
@@ -283,6 +283,7 @@ cc_binary(
     name = "_openroadpy.so",
     srcs = [":openroad_swig-py"],
     defines = [PYTHON_STABLE_API_DEFINE],
+    linkopts = PYTHON_EXTENSION_LINKOPTS,
     linkshared = True,
     deps = [
         ":openroad_lib",  # Depends on the core odb C++ library
diff --git a/bazel/python_wrap_cc.bzl b/bazel/python_wrap_cc.bzl
index 43705d590cd..9af088824c7 100644
--- a/bazel/python_wrap_cc.bzl
+++ b/bazel/python_wrap_cc.bzl
@@ -19,6 +19,14 @@ PythonSwigInfo = provider(
 
 PYTHON_STABLE_API_DEFINE = "Py_LIMITED_API=0x030A0000"
 
+PYTHON_EXTENSION_LINKOPTS = select({
+    "@platforms//os:macos": [
+        "-undefined",
+        "dynamic_lookup",
+    ],
+    "//conditions:default": [],
+})
+
 def _get_transitive_srcs(srcs, deps):
     return depset(
         srcs,
diff --git a/src/OpenRoad-py.i b/src/OpenRoad-py.i
index 17a2476835e..529b08ca7bf 100644
--- a/src/OpenRoad-py.i
+++ b/src/OpenRoad-py.i
@@ -47,11 +47,11 @@ get_db_block();
 
 %}
 
+%include "Exception-py.i"
+
 %template(Corners) std::vector<sta::Scene*>;
 %template(MTerms) std::vector<odb::dbMTerm*>;
 %template(Masters) std::vector<odb::dbMaster*>;
-
-%include "Exception-py.i"
 %include "ord/Tech.h"
 %include "ord/Design.h"
 %include "ord/Timing.h"
diff --git a/src/gpl/BUILD b/src/gpl/BUILD
index f58041f238b..a761be270ea 100644
--- a/src/gpl/BUILD
+++ b/src/gpl/BUILD
@@ -4,7 +4,7 @@
 load("@openroad_rules_python//python:defs.bzl", "py_library")
 load("@rules_cc//cc:cc_binary.bzl", "cc_binary")
 load("@rules_cc//cc:cc_library.bzl", "cc_library")
-load("//bazel:python_wrap_cc.bzl", "PYTHON_STABLE_API_DEFINE", "python_wrap_cc")
+load("//bazel:python_wrap_cc.bzl", "PYTHON_EXTENSION_LINKOPTS", "PYTHON_STABLE_API_DEFINE", "python_wrap_cc")
 load("//bazel:tcl_encode_or.bzl", "tcl_encode")
 load("//bazel:tcl_wrap_cc.bzl", "tcl_wrap_cc")
 
@@ -95,6 +95,7 @@ cc_binary(
     ],
     defines = [PYTHON_STABLE_API_DEFINE],
     includes = ["src"],
+    linkopts = PYTHON_EXTENSION_LINKOPTS,
     linkshared = True,
     deps = [
         "//src/gpl",
diff --git a/src/odb/BUILD b/src/odb/BUILD
index 427dd649cb9..edc14eeeca9 100644
--- a/src/odb/BUILD
+++ b/src/odb/BUILD
@@ -4,7 +4,7 @@
 load("@openroad_rules_python//python:defs.bzl", "py_library")
 load("@rules_cc//cc:cc_binary.bzl", "cc_binary")
 load("@rules_cc//cc:cc_library.bzl", "cc_library")
-load("//bazel:python_wrap_cc.bzl", "PYTHON_STABLE_API_DEFINE", "python_wrap_cc")
+load("//bazel:python_wrap_cc.bzl", "PYTHON_EXTENSION_LINKOPTS", "PYTHON_STABLE_API_DEFINE", "python_wrap_cc")
 load("//bazel:tcl_encode_or.bzl", "tcl_encode")
 load("//bazel:tcl_wrap_cc.bzl", "tcl_wrap_cc")
 
@@ -105,6 +105,7 @@ cc_binary(
     srcs = [":swig-py"],
     defines = [PYTHON_STABLE_API_DEFINE],
     includes = ["src/swig/common"],
+    linkopts = PYTHON_EXTENSION_LINKOPTS,
     linkshared = True,
     deps = [
         ":odb",  # Depends on the core odb C++ library
diff --git a/src/odb/test/write_def58_gzip.tcl b/src/odb/test/write_def58_gzip.tcl
index 7f5b3ceba9a..5c97a02072f 100644
--- a/src/odb/test/write_def58_gzip.tcl
+++ b/src/odb/test/write_def58_gzip.tcl
@@ -11,12 +11,16 @@ set out_gzip_def [make_result_file "write_def58_gzip.zipped.def.gz"]
 write_def $out_gzip_def
 
 exec gunzip -f $out_gzip_def
-set def0 [exec md5sum $out_def]
-set def1 [exec md5sum [string range $out_gzip_def 0 end-3]]
+set unzipped_def [string range $out_gzip_def 0 end-3]
+
+set f0 [open $out_def r]
+set def0 [read $f0]
+close $f0
+
+set f1 [open $unzipped_def r]
+set def1 [read $f1]
+close $f1
 
-# Remove filename from output
-set def0 [string range $def0 0 32]
-set def1 [string range $def1 0 32]
 if { $def0 == $def1 } {
   puts "Matched"
   puts "pass"
diff --git a/src/utl/BUILD b/src/utl/BUILD
index c4bb280665a..31dcea32a52 100644
--- a/src/utl/BUILD
+++ b/src/utl/BUILD
@@ -4,7 +4,7 @@
 load("@openroad_rules_python//python:defs.bzl", "py_library")
 load("@rules_cc//cc:cc_binary.bzl", "cc_binary")
 load("@rules_cc//cc:cc_library.bzl", "cc_library")
-load("//bazel:python_wrap_cc.bzl", "PYTHON_STABLE_API_DEFINE", "python_wrap_cc")
+load("//bazel:python_wrap_cc.bzl", "PYTHON_EXTENSION_LINKOPTS", "PYTHON_STABLE_API_DEFINE", "python_wrap_cc")
 load("//bazel:tcl_encode_or.bzl", "tcl_encode")
 load("//bazel:tcl_wrap_cc.bzl", "tcl_wrap_cc")
 
@@ -105,6 +105,7 @@ cc_binary(
     ],
     defines = [PYTHON_STABLE_API_DEFINE],
     includes = ["src"],
+    linkopts = PYTHON_EXTENSION_LINKOPTS,
     linkshared = True,
     deps = [
         "//src/utl",
diff --git a/test/regression_test.sh b/test/regression_test.sh
index 128d65b9820..5f483bd0885 100755
--- a/test/regression_test.sh
+++ b/test/regression_test.sh
@@ -23,7 +23,7 @@ case "$TEST_TYPE" in
 esac
 
 echo "Command: $CMD"
-$CMD |& tee $LOG_FILE
+$CMD 2>&1 | tee $LOG_FILE
 
 echo "Exitcode:  $?"
 
diff --git a/third-party/abc b/third-party/abc
index 4c756ffb8df..a68b23c77d4 160000
--- a/third-party/abc
+++ b/third-party/abc
@@ -1 +1 @@
-Subproject commit 4c756ffb8dff7c583e80c7970d117abd3dfddb5c
+Subproject commit a68b23c77d4c9b3947fcff9cdb7d509cad7fe46a