ZBrush 4R8 for Win will be be digitally delivered to you. Within 1 or 2 working days from your purchase you will receive an e-mail with your Licensing Information and instructions on how to download and activate the software.
ZBrush runs the same on Macintosh and Windows. Choosing one or the other is a personal choice. A fast processor with multiple cores is a key item because ZBrush is only CPU based. The more powerful, the better. You must have enough memory to handle the system and other background applications in addition to ZBrush itself. If your intent is to create complex models with many millions of polygons, aim for at least 16 GB of RAM and a 64-bit version of your OS. ZBrush is highly optimized and writes a large number of temporary files in order to ensure fast performance. Depending on your model, this can quickly reach several GB of data. An SSD drive for ZBrush and its virtual memory files will provide the best results. You can save costs by having an additional mechanical drive to save your work on. A Wacom (or compatible) pen tablet with a preference for professional models will provide you a better accuracy in your brush strokes and increase the artist feeling. The use of tablets based on N-Trig technology, which is an entirely different protocol and not fully compatible with ZBrush, is not recommended.