Update requirements_mac.txt

hluetck · web-flow · commit 01657879e14b · 2021-09-06T11:31:13.000+02:00
going back to Tensorflow 2.2.1 as 2.5.1 is not compatible with Keras version. For details see keras-team/keras#14632
diff --git a/etc/requirements_mac.txt b/etc/requirements_mac.txt
@@ -1,2 +1,2 @@
 Keras==2.4.3
-tensorflow==2.5.1
+tensorflow==2.2.1
