Cause After uploading an image recognition library called dlib, when I try to use tig or awk, I get dyld: Library not loaded: /usr/local/opt/readline/lib/libreadline.7.dylib Referenced from: /usr/local/bin/awk Reason: image not found The reason seems to be that during the dlib installation, cmake was upgraded and mac readline was upgraded from 7 to 8. tig and awk are not yet ready for readline 8, so the error seems to occur. As of November 2020, there is no problem with tig, but only with awk for now.