diff --git a/build_files/build_environment/cmake/opencolorio.cmake b/build_files/build_environment/cmake/opencolorio.cmake
index 85d6ce2483d..06314bce301 100644
--- a/build_files/build_environment/cmake/opencolorio.cmake
+++ b/build_files/build_environment/cmake/opencolorio.cmake
@@ -32,10 +32,12 @@ set(OPENCOLORIO_EXTRA_ARGS
 )
 
 if(APPLE)
-  # Work around issue where minizip-ng_LIBRARY assumes -ng in file name.
   set(OPENCOLORIO_EXTRA_ARGS
     ${OPENCOLORIO_EXTRA_ARGS}
+    # Work around issue where minizip-ng_LIBRARY assumes -ng in file name.
     -Dminizip_LIBRARY=${LIBDIR}/minizipng/lib/libminizip${LIBEXT}
+    # Work around issue where homebrew Imath's can be prioritized over our own dependency during linking if installed.
+    -DImath_LIBRARY=${LIBDIR}/imath/lib/libImath${SHAREDLIBEXT}
   )
 endif()
 
diff --git a/build_files/build_environment/cmake/tiff.cmake b/build_files/build_environment/cmake/tiff.cmake
index d5593e4dce5..624182b0dbc 100644
--- a/build_files/build_environment/cmake/tiff.cmake
+++ b/build_files/build_environment/cmake/tiff.cmake
@@ -18,6 +18,14 @@ set(TIFF_EXTRA_ARGS
   -Dsphinx=OFF
 )
 
+if(APPLE)
+  set(TIFF_EXTRA_ARGS
+    ${TIFF_EXTRA_ARGS}
+    # Work around issue where homebrew's libdeflate can be prioritized over our own dependency during linking if installed.
+    -DDeflate_LIBRARY=${LIBDIR}/deflate/lib/libdeflate${LIBEXT}
+  )
+endif()
+
 ExternalProject_Add(external_tiff
   URL file://${PACKAGE_DIR}/${TIFF_FILE}
   DOWNLOAD_DIR ${DOWNLOAD_DIR}