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The Nik Collection is free and compatible with Mac OS X 10.7 through 10.10; Windows Vista, 7, 8; and Adobe Photoshop through CC 2015. We have no plans to update the Collection or add new features over time.

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I am having trouble reading my serial number. I can't tell if a character is a letter or a number.

All Color Efex Pro 3.0 serial numbers have nine digits, followed by 16 letters. Please make sure that the first 9 characters are numbers, and the remainder of the characters are entered as letters.

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