How can I press charge against my business partner for taking company money without approval. in California

You can report it to the police. However, they will probably tell you this is a civil matter. If you cannot get your partner to return the money you can sue him for breach of fiduciary duty, an accounting, and for dissolution of the partnership.

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You can't press charges, only law enforcement can do that. You can report this to the police, but you're better off seeing a business litigator and getting a review of your written partnership agreement, if there is one, or an evaluation of your oral partnership agreement, if that's what this was, especially what approval rights were necessary for a partner to withdraw company money.

Disclaimer: Please note that this answer does not constitute legal advice, and should not be relied on, since each state has different laws, each situation is fact specific, and it is impossible to evaluate a legal problem without a comprehensive consultation and review of all the facts and documents at issue. This answer does not create an attorney-client relationship.