node.js – dyld: Library not loaded: /usr/local/opt/icu4c/lib/libicui18n.62.dylib error running php after installing node with brew on Mac-ThrowExceptions

Exception or error:

I installed node using homebrew (Mojave), afterwards php stoped working and if I try to run php -v I get this error:

php -v
dyld: Library not loaded: /usr/local/opt/icu4c/lib/libicui18n.62.dylib
  Referenced from: /usr/local/bin/php
  Reason: image not found

I tried to uninstall both node and icu4c but the problem persists

How to solve:

Note – This will upgrade your PHP version.

I just had this same problem. Upgrading Homebrew and then cleaning up worked for me. This error likely showed up for me because of a mismatch in package versions. None of the above solutions resolved my error, but running the following homebrew commands did.

brew upgrade

Caution – This will upgrade all your brew packages. If you only want to upgrade specific packages make sure to be specific.

brew upgrade // for upgrading all packages -- this is the command I used

brew upgrade {package} // for upgrading a specific package

and then

brew cleanup


In my case, that happened because icu4c was upgraded to version 63 but my locally installed postgres image still referenced icu4c 62.1. Therefore i had to change the icu4c version used:

 brew info icu4c
 brew switch icu4c <version>

Where version is the the installed version returned by info


Turns out I, like @Grey Black, had to actually install v62.1 of icu4c. Nothing else worked.

However, brew switch icu4c 62.1 only works if you have installed 62.1 in the past. If you haven’t there’s more legwork involved. Homebrew does not make it easy to install previous versions of formulae.

Here’s how I did it:

  1. We first need a deep clone of the Homebrew repo. This may take a while: git -C $(brew --repo homebrew/core) fetch --unshallow
  2. brew log icu4c to track down a commit that references 62.1; 575eb4b does the trick.
  3. cd $(brew --repo homebrew/core)
  4. git checkout 575eb4b -- Formula/icu4c.rb
  5. brew uninstall --ignore-dependencies icu4c
  6. brew install icu4c You should now have the correct version of the dependency! Now just to…
  7. git reset && git checkout . Cleanup your modified recipe.


I had the same problem after I upgraded my macOS to version 10.13.6. I can’t run composer and php commands. After researching for a while and trying various solutions posted online, reinstalling php using homebrew worked.

brew reinstall php@7.1

Added on March 14th based on Ryan’s comment

get the version you are currently using by running php -v and get the right formulae (which you can find here: to replace @7.1 in the above command.


I am actually quite surprised that this solution has not been presented yet, and I feel like it is the easiest solution.

Go to GitHub, find the version of the brewfile that matches the version of icu4c that you need and get the raw version of the file (follow the links above and click View File then Raw).

Then just have brew reinstall from that url.

For example, version 62.1:

brew reinstall


Run npm version and see if you see the same error.

If so, upgrade your node version brew upgrade npm.

==> Upgrading 1 outdated package, with result:
npm 8.1.2 -> 10.3.0
==> Upgrading npm
==> Installing dependencies for node: icu4c
==> Installing node dependency: icu4c



This fixed it for me:

brew upgrade node


Just brew remove php and brew install php did not work, nor did brew reinstall php.
My solution was to do:

brew remove php
cd /usr/local/Cellar
rm -rf php/
brew install php
brew doctor
brew cleanup

Now php -v gives me:

PHP 7.3.2 (cli) (built: Feb 14 2019 10:08:45) ( NTS )


Seems like it is impossible to link icu4c using brew after latest OS X update. Which makes things more interesting. The only solution I found working for me:

  1. Download and compile icu4c 62.1 to /usr/local/icu4c/62.1
mkdir ~/sources
cd ~/sources
tar xvzf icu4c-62_1-src.tgz
cd icu/source/

sudo mkdir /usr/local/icu4c/62.1
./configure --prefix=/usr/local/icu4c/62.1
sudo make install
  1. Link libs:
ln -s /usr/local/icu4c/62.1/lib/*.dylib /usr/local/include/
  1. Set DYLD_LIBRARY_PATH in ~/.bash_profile:
export DYLD_LIBRARY_PATH=/usr/local/include


I had problems because my version of PHP (7.3) was expecting icu4c 63 and brew would only install 64. helped me install 63.


On MacOS Mojave, only way I could fix it was with brew upgrade


brew update && brew upgrade worked for me


Rather than install an old version of icu4c that the older (precompiled) php can link to, it’s better to recompile the old php to link to the more recent library.

brew uninstall php@7.2
brew install --build-from-source php@7.2

This will build php and link it to the newer library. I found reinstall didn’t quite work; the new install choked when the destination folder already existed.

I also did brew link --force php@7.2 for my environment.


Leland’s answer worked for me, but I had to change steps 4 and 6 to:

4) git checkout -B icu4c-62.1 575eb4b

6) brew reinstall Formula/icu4c.rb


In order to downgrade, i had to recompile from source (MacOS Mojave)

$ wget
$ tar xvfz icu4c-62_1-src.tgz
$ cd icu/sources
$ ./configure
$ make
$ make install


For me brew reinstall nodejs fixed this – my issue was with running Elixir/Phoenix so not PHP specific, I think it was caused by brew install postgres, but reinstalling that didn’t help. I was getting it from npm commands.


Got this error, too, after installing php 7.3. I had it resolved upgrading just my old php’s versions (5.6 and 7.0, not from the official repos).

The maintainers had compiled new php versions against the current icu4c.

In my case, PHP 7 got from 0.31 to 0.33, and the problem was solved.


i followed this article here and this seems to be the missing piece of the puzzle for me:

brew uninstall node@8

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