解决了.我需要指定实际路径，而不是文件名 - 我试过:

Solved it. I needed to specify the actual path, not the filename - I tried:

export DYLD_LIBRARY_PATH=/Applications/mampstack-5.4.36-0/mysql/lib/ 

而不是:

export DYLD_LIBRARY_PATH=/Applications/mampstack-5.4.36-0/mysql/lib/libmysqlclient.18.dylib