trying to install bcrypt into node project + node set up issues

OP managed to fix this for themselves with:

sudo xcode-select -switch /Applications/Xcode.app/Contents/Developer/

but graciously accepted my answer anyway.

Original answer below:

There are two distinct problems here. One is that your node is slightly out of date and your npm is substantially out of date.

You're using OSX, so there are a number of popular ways to manage different node versions. Here's a guide on updating node https://github.com/npm/npm/wiki/Troubleshooting#updating-node-on-osx

Then you'll want to update to the latest npm:

npm install -g npm@latest

Finally, it looks like although you have XCode installed, something is still awry. You report that this command yields

$ xcode-select --print-path /Library/Developer/CommandLineTools

On my system, which is OSX/Yosemite and can build native addon modules, I see

$ xcode-select --print-path /Applications/Xcode.app/Contents/Developer

You may need to switch your xcode path to a different directory. For starters, though, please update to the current node and npm tools and try the installation again; if it still fails, the least dangerous next thing to try is

xcode-select --install

If none of that fixes things, let me know and I'll try to help further.

I was having a similar issue but with a different package.

node-gyp rebuild
No receipt for 'com.apple.pkg.CLTools_Executables' found at '/'.
No receipt for 'com.apple.pkg.DeveloperToolsCLILeo' found at '/'.
No receipt for 'com.apple.pkg.DeveloperToolsCLI' found at '/'.
gyp: No Xcode or CLT version detected!
gyp ERR! configure error

Running macOS Catalina 10.15.2, I tried the following:

$ xcode-select --install
xcode-select: error: command line tools are already installed, 
use "Software Update" to install updates

Fixed it by doing the following:

$ [sudo] xcode-select --reset

Hope this helps someone in the future.

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EDIT

If someone is still running into issues, there's a thread on GitHub that has other solutions worth trying:

• github.com/schnerd/d3-scale-cluster/issues