Setup all your macros the way you want them. after that type

/script BackupMacros();

this will save your macros to your machine they will be located in you wtf/accountname/server/toonname macros.old

then move the .old file to whatever computer you want to play on next

log in and type

/script RestoreMacros();

this will load the macros from your .old file


TO UPDATE YOUR MACROS SERVERSIDE

login on your character
while logged on open your wtf/accountname/server/toonname folder
delete all the macro files you see ( the .wtf and .old files)
make sure you DONT logout yet
now type
/script BackupMacros();
you should see it create macros.old in the folder
now type
/script RestoreMacros();
now it will create a new macros.wtf file (this is the file that is written to the server)
now logout to save your settings and ths will upload your new settings to the server

To save myself a headache i always keep an updated macros.old file from all my toons on a flash drive if i want to login somewhere else to mess around, always nice to have a backup cause it can get screwy