diff --git a/ci/test-stable.sh b/ci/test-stable.sh
index 4adede9f0e..e0480e62d0 100755
--- a/ci/test-stable.sh
+++ b/ci/test-stable.sh
@@ -12,8 +12,15 @@ _() {
   "$@"
 }
 
-if [[ $(ulimit -n) -lt 65000 ]]; then
-  ulimit -n 65000 || echo 'Error: nofiles too small, run "ulimit -n 65000" to continue' && exit 1
+maxOpenFds=65000
+if [[ $(uname) = Darwin ]]; then
+  maxOpenFds=24576 # Appears to be the max permitted on macOS...
+fi
+if [[ $(ulimit -n) -lt $maxOpenFds ]]; then
+  ulimit -n $maxOpenFds|| {
+    echo 'Error: nofiles too small, run "ulimit -n 65000" to continue';
+    exit 1
+  }
 fi
 
 _ cargo build --all --verbose