Updated FAQ (markdown)

diff --git a/FAQ.md b/FAQ.md
index 241854c2f90dadd8dbe21cf6e51fdba1ca10b99f..834822e1e8c618e4937edc0901181ef3677f7ba3 100644 (file)
--- a/FAQ.md
+++ b/FAQ.md
@@ -210,4 +210,13 @@ avrdude -patmega32u4 -cavr109 -b57600 -Uflash:w:adb_usb.hex -P/dev/ttyACM0
 Device name will vary depending on your system.\r
 \r
 http://arduino.cc/en/Main/ArduinoBoardMicro\r
-https://geekhack.org/index.php?topic=14290.msg1563867#msg1563867
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+https://geekhack.org/index.php?topic=14290.msg1563867#msg1563867\r
+\r
+\r
+## USB 3 compatibility\r
+I heard some people have a problem with USB 3 port, try USB 2 port.\r
+\r
+\r
+## Mac compatibility\r
+- OS X 10.11 and Hub: https://geekhack.org/index.php?topic=14290.msg1884034#msg1884034\r
+https://geekhack.org/index.php?topic=14290.msg1884034#msg1884034
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