diff --git a/tools/internal_ci/macos/grpc_build_artifacts.cfg b/tools/internal_ci/macos/grpc_build_artifacts.cfg
index 733933c62a66057d0dba61498a04e4166b38cbc3..4da61faed36ebf3cd8bd85665862f6f451967e99 100644
--- a/tools/internal_ci/macos/grpc_build_artifacts.cfg
+++ b/tools/internal_ci/macos/grpc_build_artifacts.cfg
@@ -16,6 +16,7 @@
 
 # Location of the continuous shell script in repository.
 build_file: "grpc/tools/internal_ci/macos/grpc_build_artifacts.sh"
+gfile_resources: "/bigstore/grpc-testing-secrets/gcp_credentials/GrpcTesting-d0eeee2db331.json"
 timeout_mins: 120
 action {
   define_artifacts {
diff --git a/tools/internal_ci/macos/grpc_interop.cfg b/tools/internal_ci/macos/grpc_interop.cfg
index 9f3742c4864b34c9641ac896a824c66fc174c694..b4b1b15cb40adf4146ecbc2921ebe2cd8cd187f8 100644
--- a/tools/internal_ci/macos/grpc_interop.cfg
+++ b/tools/internal_ci/macos/grpc_interop.cfg
@@ -16,6 +16,7 @@
 
 # Location of the continuous shell script in repository.
 build_file: "grpc/tools/internal_ci/macos/grpc_interop.sh"
+gfile_resources: "/bigstore/grpc-testing-secrets/gcp_credentials/GrpcTesting-d0eeee2db331.json"
 timeout_mins: 240
 action {
   define_artifacts {
diff --git a/tools/internal_ci/macos/pull_request/grpc_interop.cfg b/tools/internal_ci/macos/pull_request/grpc_interop.cfg
index 9f3742c4864b34c9641ac896a824c66fc174c694..b4b1b15cb40adf4146ecbc2921ebe2cd8cd187f8 100644
--- a/tools/internal_ci/macos/pull_request/grpc_interop.cfg
+++ b/tools/internal_ci/macos/pull_request/grpc_interop.cfg
@@ -16,6 +16,7 @@
 
 # Location of the continuous shell script in repository.
 build_file: "grpc/tools/internal_ci/macos/grpc_interop.sh"
+gfile_resources: "/bigstore/grpc-testing-secrets/gcp_credentials/GrpcTesting-d0eeee2db331.json"
 timeout_mins: 240
 action {
   define_artifacts {