Command nvm not found and Command node not found after already installed nvm on MacOS?

Ziyi Chu — Tue, 17 Sep 2024 14:33:52 +0000

Why do we see these types of errors?

Command nvm not found
Command node not found

Because we didn't add the source lines to the correct shell startup script, that is, ~/.bash_profile, ~/.zshrc, ~/.profile, or ~/.bashrc, depending on the shell program you are using.

How do you find these startup scripts?

These files that begin with a "." are usually hidden, so you can't find them in the Finder, or by "ls" command.

Find hidden files in the Finder Window: Press Command-Shift-period

To find hidden files in terminal:

cd ~
ls -a ~

Source lines to add

//source line added
export NVM_DIR="$HOME/.nvm"
[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"  # This loads nvm
[ -s "$NVM_DIR/bash_completion" ] && \. "$NVM_DIR/bash_completion"  # This loads nvm bash_completion

Reference:
1.https://blog.logrocket.com/how-switch-node-js-versions-nvm/
2.https://discussions.apple.com/thread/254493189?sortBy=rank

How to fix the: "EMFILE: too many open files, watch" error in macOS

Ziyi Chu — Tue, 17 Sep 2024 14:23:07 +0000

I've tried to build a react-native project on my MacBook Pro, but when running the command:

npx react-native start

I get the error:

Error: EMFILE: too many open files, watch

There are several solutions online, but they are scattered, so I am here to summarize.

Solution1: watchman

brew install watchman

The watchman utility enables React-Native to watch file changes.

Solution 2: change Node.js version with nvm

Run the command below to check the Node version:

nvm current

Switch Node version by:

nvm install --<the node version>
nvm use <version_number>

For example:

nvm install 12.18.3
nvm use 12.18.3

To see all Node versions you've installed, use:

nvm ls

To see all published Node versions, use:

nvm ls-remote

Usually, we should try several versions. Newest(v22.8.0), new(v20.0), and old (v17.3). This should solve the problem.

Reference:
1.https://flaviocopes.com/react-native-emfile-too-many-open-files/
2.https://flatirons.com/blog/how-to-set-a-default-node-version-with-nvm/
3.https://blog.logrocket.com/how-switch-node-js-versions-nvm/

DEV Community: Ziyi Chu

Command nvm not found and Command node not found after already installed nvm on MacOS?

How do you find these startup scripts?

Source lines to add

How to fix the: "EMFILE: too many open files, watch" error in macOS