From 8e3fc8964c206cd15dbe4101a68f4e5c8a27fe11 Mon Sep 17 00:00:00 2001
From: Winfried Bruns <wbruns@uos.de>
Date: Tue, 28 May 2024 10:44:54 +0200
Subject: [PATCH] Back to MacOS 12

---
 .github/workflows/ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 89db80f..7764fcb 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -46,7 +46,7 @@ jobs:
           ./.ci-run-tests.sh
 
   mac-os:
-    runs-on: macos-latest
+    runs-on: macos-12
     env:
       EANTIC: yes
       NAUTY: yes