diff --git a/.circleci/config.yml b/.circleci/config.yml
index 08bc03f609..2b56d53350 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -14,6 +14,8 @@ version: 2.1
 #      https://circleci.com/docs/2.0/configuration-reference/#parameters-requires-version-21
 jobs:
   osx-xcode:
+    # https://circleci.com/docs/using-macos/#available-resource-classes
+    resource_class: m2pro.large
     parameters:
       XCODE_VER:
         type: string