npm install and fails on node-gyp rebuild with ```gyp: No Xcode or CLT version detected!``` caused by new macos catalina update

Question

gyp: No Xcode or CLT version detected! gyp ERR! configure error gyp ERR! stack Error: gyp failed with exit code: 1 gyp ERR! stack at ChildProcess.onCpExit (/Users/synapse/.nvm/versions/node/v8.8.0/lib/node_modules/npm/node_modules/node-gyp/lib/configure.js:344:16) gyp ERR! stack at emitTwo (events.js:125:13) gyp ERR! stack at ChildProcess.emit (events.js:213:7) gyp ERR! stack at Process.ChildProcess._handle.onexit (internal/child_process.js:200:12) gyp ERR! System Darwin 19.3.0 gyp ERR! command "/Users/synapse/.nvm/versions/node/v8.8.0/bin/node" "/Users/synapse/.nvm/versions/node/v8.8.0/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild" gyp ERR! cwd /Users/synapse/Documents/synapsefi-dev-ui/node_modules/watchpack/node_modules/fsevents gyp ERR! node -v v8.8.0 gyp ERR! node-gyp -v v5.0.3 gyp ERR! not ok npm WARN [email protected] No repository field. npm WARN The package country-data is included as both a dev and production dependency. npm WARN The package react-dropzone is included as both a dev and production dependency. npm WARN optional SKIPPING OPTIONAL DEPENDENCY: [email protected] (node_modules/watchpack/node_modules/fsevents): npm WARN optional SKIPPING OPTIONAL DEPENDENCY: [email protected] in

gyp: No Xcode or CLT version detected!
gyp ERR! configure error
gyp ERR! stack Error: `gyp` failed with exit code: 1
gyp ERR! stack     at ChildProcess.onCpExit (/Users/synapse/.nvm/versions/node/v8.8.0/lib/node_modules/npm/node_modules/node-gyp/lib/configure.js:344:16)
gyp ERR! stack     at emitTwo (events.js:125:13)
gyp ERR! stack     at ChildProcess.emit (events.js:213:7)
gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:200:12)
gyp ERR! System Darwin 19.3.0
gyp ERR! command "/Users/synapse/.nvm/versions/node/v8.8.0/bin/node" "/Users/synapse/.nvm/versions/node/v8.8.0/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild"
gyp ERR! cwd /Users/synapse/Documents/synapsefi-dev-ui/node_modules/watchpack/node_modules/fsevents
gyp ERR! node -v v8.8.0
gyp ERR! node-gyp -v v5.0.3
gyp ERR! not ok
npm WARN [email protected] No repository field.
npm WARN The package country-data is included as both a dev and production dependency.
npm WARN The package react-dropzone is included as both a dev and production dependency.
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: [email protected] (node_modules/watchpack/node_modules/fsevents):
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: [email protected] install: `node-gyp rebuild`
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: Exit status 1

stall: node-gyp rebuild npm WARN optional SKIPPING OPTIONAL DEPENDENCY: Exit status 1

Answer 1

Go to your finder and type in "Terminal" to open the Terminal app. Copy and paste: sudo rm -rf /Library/Developer/CommandLineTools push enter *you have now manually removed your command line tools

then go to https://developer.apple.com/download/more/ and search "Command Line Tools for Xcode 11.3.1" Click it and then download it *you have now manually added a command line tools set

**Note: My Macbook Pro then kept telling me to update my command lines software. I ended up updating my software to Command Line Tools for Xcode 12.2 and it still works. I would recommend trying to update your Command Line Tools if your computer settings says it's available. If not, do the steps I just mentioned and it should work :slight_smile:

Answer 2

The repository node-gyp contains a dedicated troubleshooting guide for macOS Catalina:

https://github.com/nodejs/node-gyp/blob/master/macOS_Catalina.md

TLDR:

Installation notes for macOS Catalina (v10.15)

Both upgrading to macOS Catalina and running a Software Update in Catalina may cause normal node-gyp installations to fail. This might manifest as the following error during npm install:

gyp: No Xcode or CLT version detected!

Solutions

There are three ways to install the Xcode libraries node-gyp needs on macOS. People running Catalina have had success with some but not others in a way that has been unpredictable.

• With the full Xcode (~7.6 GB download) from the App Store app.
• With the much smaller Xcode Command Line Tools via xcode-select --install
• With the much smaller Xcode Command Line Tools via manual download.