This is a simple Quicklook plugin for macOS Finder to preview the structure of dotTHz files, for imaging scans it also provides a simple render/preview. This works with extensions .thz, .thzimg and .thzswp.
It requires that hdf5 is installed:
brew install hdf5Pre-compiled binaries are provided for Apple Silicon (Arm64) here: Releases
To install, you need to place the main app DotTHzQL.app in the Applications folder and launch it once. This should register the plugin with the operating system and it should work.
The main app needs to remain in the Applications folder.
If it does not work, try running this:
qlmanage -r cache
qlmanage -r
killall -9 Finder
killall -9 mdworker_shared