diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 07ecb7ae..dea1256b 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -47,7 +47,7 @@ jobs:
           - '1.9'
         os:
           - ubuntu-latest
-          - macOS-latest
+          - macos-13
           - windows-latest
         arch:
           - x64
diff --git a/src/util.jl b/src/util.jl
index 52adb42a..629ce4ab 100644
--- a/src/util.jl
+++ b/src/util.jl
@@ -152,7 +152,7 @@ function analyze_convergence(errors, iterations,
         mean_values = zeros(nvariables)
         for v in 1:nvariables
             mean_values[v] = sum(eocs[kind][:, v]) ./ length(eocs[kind][:, v])
-            @printf("%-10s", "mean")
+            @printf("%-15s", "mean")
             @printf("%-10.2f", mean_values[v])
         end
         eoc_mean_values[kind] = mean_values