dyld: lazy symbol binding failed: Symbol not found: _PQsetErrorContextVisibility

问题

On running

$ psql

I get this error

dyld: lazy symbol binding failed: Symbol not found: 
_PQsetErrorContextVisibility
Referenced from: /usr/local/bin/psql
Expected in: /usr/local/lib/libpq.5.dylib

dyld: Symbol not found: _PQsetErrorContextVisibility
Referenced from: /usr/local/bin/psql
Expected in: /usr/local/lib/libpq.5.dylib

Abort trap: 6

I have tried a few things:

1. few posts suggested to update brew
2. few suggested adding /usr/local/bin/psql to the ~/.bash_profile and restarting the system
3. few said it was problem with XCode but I do not have XCode installed so it isnt valid for me I guess.

but none of it worked.

my bash_profile looks like this

PATH="/usr/local/bin/psql:/usr/local/sbin:/usr/local/bin:/sbin:/bin
:/usr/sbin:/usr/bin:/root/bin:/usr/local/bin/geckodrive‌​r:$PATH"
export PATH

I am using:

• psql (PostgreSQL) 9.6.2
• macOS Sierra version 10.12.3

回答1:

I was on PostgreSQL 9.6.2 as well, and ran into the same problem.

I upgraded to 9.6.3 using brew like this:

rm '/usr/local/lib/libpq.5.dylib'
brew upgrade postgresql
brew link postgresql

It worked, and now I have access via psql again.

回答2:

The thing that worked for me was uninstalling and reinstalling postgres using the code below:

brew uninstall postgresql
brew install postgresql

来源：https://stackoverflow.com/questions/44393800/dyld-lazy-symbol-binding-failed-symbol-not-found-pqseterrorcontextvisibility