Best practices
Write succinct labels that describe the current value and both endpoints of the range.
Consider filling the path with a gradient to help communicate the purpose of the gauge.
Platform considerations
macOS
Continuous.
Discrete.
Consider using the continuous style for large ranges.
Consider changing the fill color to inform people about significant parts of the range.
For the complete guidance, including worked examples and illustrations, see the canonical page: https://developer.apple.com/design/human-interface-guidelines/gauges