Answer: Both the Advantage and CORE armbands are Mac-compatible. System requirements are below.

CORE Armband (view product details)

Advantage Armband
Here's how to upload from your Mac the first time:
- Log into your dotFIT.com program with your Mac
- Click View My Program
- Click BODY SENSOR on the Summary page
- Click INSTALL SOFTWARE
- Restart your computer as directed
- Repeat steps 1 and 2 above, and then click UPLOAD DATA
SYSTEM REQUIREMENTS
All Users:
- Available USB Port
- High speed Internet access
- Subscription to dotFIT program
PC Users:
- Windows XP/Vista/7/8
- Browsers:Firefox, IE 8+
Mac Users:
- What Mac OS Version does the program and client support?
- Mac OS X 10.5 or later with an Intel processor:
- 10.5+ = Leopard
- 10.6+ = Snow Leopard
- 10.7+ = Lion Lion
- 10.8+ = Mountain Lion
- 10.9+ = Mavericks
- 10.10+ = Yosemite
- Browsers: Safari, Chrome or Firefox
If you're having trouble, please call Technical Support at 877.436.8348 between the hours of 8 am and 5 pm Pacific Time, Monday through Friday, or email us at support@dotFIT.com.