Having Logic Pro on two different computers

The App Store version can be put on as many computers as you own or control; it's authorized the same as any other application there.

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You just need to be logged into each computer using the same Apple ID that you used to buy Logic.

This may not affect what you want to do, but bear in mind that the version you download on the iMac could be different to that downloaded on the MBP if the OS's are different.