diff --git a/compiler-rt/test/asan/TestCases/Darwin/interface_symbols_darwin.cpp b/compiler-rt/test/asan/TestCases/Darwin/interface_symbols_darwin.cpp
--- a/compiler-rt/test/asan/TestCases/Darwin/interface_symbols_darwin.cpp
+++ b/compiler-rt/test/asan/TestCases/Darwin/interface_symbols_darwin.cpp
@@ -19,7 +19,15 @@
 // RUN:  | sed -e "s/__asan_version_mismatch_check_v[0-9]+/__asan_version_mismatch_check/" \
 // RUN:  > %t.exports
 //
-// RUN: sed ':a;N;$!ba;s/([\n ]*/(/g'                                             \
+// note: SED differs between GNU and BSD in handling semicolon and the use of
+//       '\n' in regex patterns. For macOS we must change this GNU syntax:
+//           sed -e ':a' -e 'N' -e '$!ba'
+//       to a form that both GNU and BSD can agree upon (below).
+//
+// RUN:  sed -e ':a' -e 'N' -e '$!ba'                                             \
+// RUN:      -e 's/ //g'                                                          \
+// RUN:      -e ':b' -e 's/\n\n/\n/g' -e 'tb'                                     \
+// RUN:      -e 's/(\n/(/g'                                                       \
 // RUN:  %t.asan_interface.inc                                                    \
 // RUN:  %p/../../../../lib/ubsan/ubsan_interface.inc                             \
 // RUN:  %p/../../../../lib/sanitizer_common/sanitizer_common_interface.inc       \