You can't make an omelet without breaking eggs.

Literal

Egg [object-を] break-[if-ば] not, omelet [topic-は] make-cannot.

A direct translation of the English proverb. The structure ~なければ...ない ('if X is not done, [Y] can't happen') uses the ~ば conditional on the negative stem. オムレツ is a katakana loanword via French 'omelette.' 作れない is the potential negative of 作る.