einstein’s legacy (www.einsteinslegacy.com) has announced Monochrome 3.0.1 for Mac OS X. It’s an upgrade of the application for post-processing batches of color images to grayscale.

Monochrome gives you control over the conversion process and applied effects, so you can create a consistent set of output images. Version 3.0.1 improves user interface responsiveness, adds a histogram tool along with additional GPU-based image effects, and provides fullscreen and high-resolution drawing support.

Monochrome requires Mac OS X Yosemite. It’s available for US$19.99 at the Mac App Store (in the Photography category).