Will not compile for modern macOS

[glorious1]

My qlstephen stopped working when I upgraded to Sequoia 15.0.1.

Some discussions said you have build it yourself, then it will work. It wouldn't build because the build process requires Xcode. I installed Xcode. But running make results in:

. . . qlstephen/QuickLookStephenProject/QuickLookStephen.xcodeproj: warning: The macOS deployment target 'MACOSX_DEPLOYMENT_TARGET' is set to 10.6, but the range of supported deployment target versions is 10.13 to 15.0.99. (in target 'QuickLookStephen' from project 'QuickLookStephen') ** BUILD FAILED **

[pubfnbar]

QLStephen (installed via Homebrew on Apple Silicon) stopped working on Sequoia for me too. On Sonoma, the following way of installing worked, but it doesn't work on Sequoia (I tried this after uninstalling via brew uninstall --cask qlstephen):

brew install --cask qlstephen
xattr -cr ~/Library/QuickLook/QLStephen.qlgenerator
qlmanage -r
qlmanage -r cache
killall Finder

Then add the appropriate text file UTI types to the LSItemContentTypes array of strings in ~/Library/QuickLook/QLStephen.qlgenerator/Contents/Info.plist and then:

qlmanage -r
killall Finder

Perhaps QLStephen doesn't work because it's using the Quick Look Generator API that has been deprecated in Sequoia.

[glorious1]

I wonder why it doesn't work to copy Apple's Text.qlgenerator into ~/Library/Quicklook and add the item type(s) to the Info.plist file.