1 Answer

System requirements
Windows

1 GHz or faster processor Intel® Pentium® 4, Intel Centrino®, Intel Xeon®, or Intel Core™ Duo (or compatible) processor
Microsoft® Windows XP with Service Pack 2 (Service Pack 3 recommended); Windows Vista® Home Premium, Business, Ultimate, or Enterprise with Service Pack 1; or Windows 7
1GB minimum RAM (2GB recommended)
3GB of available hard-disk space for installation; additional free space required during installation (cannot install on flash-based storage devices)
DVD-ROM drive
1,024x576 display (1,280x1024 recommended) with 16-bit video card
Broadband Internet connection required for online services and to validate Subscription Edition (if applicable) on an ongoing basis*— For updates to system requirements, visit https://www.adobe.com/go/cp_sysreq
Adobe online services, including Adobe CS Live Services, are available only to users 13 and older and require agreement to additional terms and Adobe’s online privacy policy https://www.adobe.com/go/terms. Online services are not available in all countries or languages, may require user registration and may be subject to change or discontinuation without notice. Additional fees or subscription charges may apply. Some Online Services may be subject to fees and require a subscription. Fees subject to change.For more details and to review the applicable terms of use and Online Privacy Policy, visit https://www.adobe.com.
Mac OS

Multicore Intel® processor
Mac OS X v10.5.7 or v10.6
1GB minimum RAM (2GB recommended)
3GB of available hard-disk space for installation; additional free space required during installation (cannot install on a volume that uses a case-sensitive file system or on flash-based storage devices)
DVD-ROM drive
1,024x576 display (1,280x1024 recommended) with 16-bit video card
Broadband Internet connection required for online services and to validate Subscription Edition (if applicable) on an ongoing basis*.—For updates to system requirements, visit https://www.adobe.com/go/cp_sysreq.
Adobe online services, including Adobe CS Live Services, are available only to users 13 and older and require agreement to additional terms and Adobe’s online privacy policy https://www.adobe.com/go/terms . Online services are not available in all countries or languages, may require user registration and may be subject to change or discontinuation without notice. Additional fees or subscription charges may apply. 

http://www.adobe.com/products/captivate/tech-specs.html