Lightroom has 64-bit support for the latest Mac OS version, which speeds up image processing. Thanks to its enhanced online sharing integration, Lightroom 4 lets you easily post images to social media and photo sharing sites like Facebook and Flickr, as well as see online comments about your works, right within the app. The system requirements for Adobe Photoshop Lightroom 4 are a multicore Intel processor with 64-bit support, Mac OS X v10.6.8 or v10.7, 2GB of RAM, 1GB of available hard-disk space, a 1024x768 display, a DVD-ROM drive, and an Internet connection for web-based services. Supported languages include English, Chinese, Dutch, French, German, Italian, Japanese, Korean, Portuguese, Spanish, and Swedish. Download Adobe Photoshop Lightroom 4 for Mac