Minimum system requirements:
Screen resolution: 1280×768 or greater (this is not intended for netbooks!). 1250 x 750 is about the absolute minimum.
Windows OS: Windows 7 or newer (Vista might work, but is unconfirmed)
Mac OS X: v10.7 (Lion) through v10.12 (Sierra). High Sierra compatibility is not guaranteed at this point, but working on it.
Linux: Linux is not officially supported (MapForge can’t be compiled to run natively on Linux), but users might be able to run the software using WINE or Virtualbox.
RAM: 4 GB of free RAM recommended (beyond that used by the operating system and any other running apps)
Internet access: MapForge can be used offline. The only time you’ll need internet access is to register new Add-Ons, download free software updates. If you happen to be online when you launch the app, you will automatically be informed of new software updates and Add-Ons as they become available.
Other: MapForge’s requirements are relatively modest. It should be usable on a typical 3-4 year old PC. RAM is probably more important than having the latest-and-greatest CPU. A dedicated video card is preferable to integrated graphics. A Flash drive is preferable to a hard drive (especially low RPM hard drives).
Try Before You Buy:
Given that no software can be guaranteed to run well on any given computer (even those that meet the minimum system requirements listed above, and that MapForge can be used and tested without a license, you should definitely try it out on your computer before purchasing a license or content Add-Ons.