diff --git a/tools/remote_build/mac.bazelrc b/tools/remote_build/mac.bazelrc
index fb8833a9618..cc201565f71 100644
--- a/tools/remote_build/mac.bazelrc
+++ b/tools/remote_build/mac.bazelrc
@@ -4,9 +4,6 @@
 # but try to use RBE build cache and upload results
 # to ResultStore
 
-# don't use port server
-build --define GRPC_PORT_ISOLATED_RUNTIME=1
-
 startup --host_jvm_args=-Dbazel.DigestFunction=SHA256
 
 # remote cache is needed not only for build speedup,