The MAC spoofing feature disables that Wi-Fi adapter, not only "by default".

79f9dae3 · Tails developers · 47346289 · 79f9dae3
Commit 79f9dae3 authored Jan 23, 2015 by Tails developers
--- a/wiki/src/news/version_1.2.3.mdwn
+++ b/wiki/src/news/version_1.2.3.mdwn
@@ -45,9 +45,8 @@ for technical details.
 * It is [[hard to exchange files with the I2P Browser|support/known_issues#i2p_browser]].

 * Tails' MAC spoofing feature disables
-  [[Broadcom BCM43224 wireless adapters|support/known_issues#bcm43224]]
-  by default. This network adapter can be found in the MacBook Air
-  5,1.
+  [[Broadcom BCM43224 wireless adapters|support/known_issues#bcm43224]].
+  This network adapter can be found in the MacBook Air 5,1.

 * [[Longstanding|support/known_issues]] known issues.