If you are using the QuickLens Mac App Store tool for measuring and inspecting designs, "fixes" usually involve version updates to maintain compatibility with newer macOS versions.
Are you trying to resolve a in a specific app or a mechanical issue with a photography lens? Pentax-M 28mm 2.8 Disassembly and Sticky Aperture Repair QuickLens 2.8 fix
If you are looking for a "Quick Fix" for a physical (like a 24-70mm or 28mm prime), common issues and DIY solutions include: If you are using the QuickLens Mac App
: If the lens won't communicate at f/2.8, clean the gold metal contacts with a pencil eraser or a Q-tip with a tiny amount of alcohol. 3. Software/Coding Library QuickLens 2.8 fix
: A popular "quick fix" for this specific lens is applying a 65mm x 1.5mm O-ring just below the zoom ring to add friction.
: Because it is a lightweight tool, most performance issues or crashes are resolved by a clean reinstall from the Mac App Store.