On german mac keyboards (Macbooks up to latest model), the [ character is done using "opt + 5" (and the ] character is opt + 6).Trying to do the Unindent shortcut in sublime with CMD is then "CMD + OPT + 5", which will switch to a 4-window grid pattern but not unindent. Indenting with CMD + OPT + 6 works, however.
My suggestion: move the alt+cmd+5 shortcut for 4-window layout to cmd+opt+4 on germany keyboard layouts. Indenting is far more important than window layouting.
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