I was trying to start psql but got
psql: could not connect to server: No such file or directory
Is the server running locally and accepting
connections on Unix domain socket "/tmp/.s.PGSQL.5432"?
When I used postgres -D /usr/local/var/postgres, got the following error:
dyld: Library not loaded: /usr/local/opt/icu4c/lib/libicui18n.63.dylib
Referenced from: /usr/local/bin/postgres
Reason: image not found
[1] 2559 abort postgres -D /usr/local/var/postgres
A quick search on libicui18n.63.dylib showed me I need icu4c lib with version 63. However brew list icu4c says I have the version 64.2.
I tried both brew install icu4c 63 & brew install icu4c@63 but no luck.
Can anyone help, please? Thanks in advance.
Solution:
1) cd to Homebrew's formula directory
cd $(brew --prefix)/Homebrew/Library/Taps/homebrew/homebrew-core/Formula
2) Find desired commit (version 63 for icu4c) to checkout
git log --follow icu4c.rb
3) Checkout to a new branch
git checkout -b icu4c-63 e7f0f10dc63b1dc1061d475f1a61d01b70ef2cb7
4) Reinstall the library with the new version
brew reinstall ./icu4c.rb
5) Switch to the reinstalled version
brew switch icu4c 63.1
6) Checkout back to master
git checkout master
Sources:
Like @dingusjh says, but use reinstall command instead of install in case brew complains about having icu4c installed already and you should try to extract. The complete command would then be:
brew reinstall https://raw.githubusercontent.com/Homebrew/homebrew-core/e7f0f10dc63b1dc1061d475f1a61d01b70ef2cb7/Formula/icu4c.rb
This should be easier.
brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/e7f0f10dc63b1dc1061d475f1a61d01b70ef2cb7/Formula/icu4c.rb
来源：https://stackoverflow.com/questions/55826221/install-icu4c-version-63-with-homebrew