diff --git a/src/borg/helpers/fs.py b/src/borg/helpers/fs.py
index 29e4bb8e0..7e2e5efe2 100644
--- a/src/borg/helpers/fs.py
+++ b/src/borg/helpers/fs.py
@@ -93,7 +93,7 @@ def get_security_dir(repository_id=None, *, legacy=True):
     return security_dir
 
 
-def get_cache_dir(*, legacy=True):
+def get_cache_dir(*, legacy=False):
     """Determine where to repository keys and cache"""
 
     if legacy:
diff --git a/src/borg/testsuite/helpers.py b/src/borg/testsuite/helpers.py
index 6b1447da7..a1ae9c51c 100644
--- a/src/borg/testsuite/helpers.py
+++ b/src/borg/testsuite/helpers.py
@@ -646,9 +646,12 @@ def test_get_cache_dir(monkeypatch):
     monkeypatch.delenv("BORG_BASE_DIR", raising=False)
     if is_win32:
         monkeypatch.delenv("BORG_CACHE_DIR", raising=False)
-        assert get_cache_dir(legacy=False) == os.path.join(
-            os.path.expanduser("~"), "AppData", "Local", "borg", "borg", "Cache"
-        )
+        assert get_cache_dir() == os.path.join(os.path.expanduser("~"), "AppData", "Local", "borg", "borg", "Cache")
+    elif is_darwin:
+        monkeypatch.delenv("BORG_CACHE_DIR", raising=False)
+        assert get_cache_dir() == os.path.join(os.path.expanduser("~"), "Library", "Caches", "borg")
+        monkeypatch.setenv("BORG_CACHE_DIR", "/var/tmp")
+        assert get_cache_dir() == "/var/tmp"
     else:
         monkeypatch.delenv("XDG_CACHE_HOME", raising=False)
         monkeypatch.delenv("BORG_CACHE_DIR", raising=False)