add note for mac copying

en/firmwareupdate.md

-<!-- # Currently: Broccoli (day 1 - 19:00)
+# Currently: Broccoli (day 1 - 19:00)
 https://card10.badge.events.ccc.de/release/card10-v1.2.zip
--->
-## Asparagus
-As of Day 1, 18:00
-Asparagus is the firmware that is loaded on the card10s handed out on day 1 from 18:00
-There are currently no previous releases
 
 # Update the firmware release on your card10
 * download the current firmware `.zip` file to your computer
 * extract it
 * put your card10 into [USB storage mode](/en/gettingstarted#usb-storage)
 * copy over the files you just extracted directly into the main folder
+on mac devices it is recommended to use the terminal, e.g. for the broccoli release: `cp -r Downloads/card10-v1.2-broccoli/* /Volumes/CARD10/`
 * eject your device (if you're doing this in the command line: don't forget the `sync` on linux)
 * switch your card10 on and off again
 
 # Previous Releases
+## Asparagus
+As of Day 1, 18:00
+Asparagus is the firmware that is loaded on the card10s handed out on day 1 from 18:00
+There are currently no previous releases
+