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Acrobat XI is compatible with MAC OS but system should meet below system requirements :
Mac OS
- Intel® processor
- Mac OS X v10.6.8, v10.7.4, or v10.8
- 1GB of RAM
- 1.5GB of available hard-disk space
- 1024x768 screen resolution
- DVD-ROM drive
- Safari 5.1 for Mac OS X v10.6.8; Safari 5.2 or 6 for Mac OS X v10.7.4 or v10.8
