Mac users with macOS Mojave and macOS Catalina, and new operating systems in place can now install Command Line Tools from the Xcode IDE without needing to install the entire Xcode package, or opening an Apple developers account. Before you delete some files from your Mac PC, you will be able to preview them first. This means that all the things or actions will be in control. Follow the steps below on how to completely uninstall xcode 10 or other versions: Step 1. Download and Install iMyMac PowerMyMac on Your Mac. If you perform a fresh install of Xcode, you will also need to add the commandline tools by running xcode-select-install on the terminal. While OS X comes with a large number of Unix utilities, those familiar with Linux systems will notice one key component missing: a package manager.
- Users who don’t have Xcode can install it with a single command: xcode-select -install. With Xcode running on your Mac, you can check whether Git is also available by prompting for the Git version: git -version. The output should display the latest Git release, as in the example below. Git version 2.25.0 (Apple Git-66) If you do not have.
- In my mac mini I've running Catalina 10.15.7. I've also installed Xcode 12.4. Now as I'm using third party library I'm trying to install cocoapods in my mac. So I used this - sudo gem install cocoapods which I got from official website. But I'm getting this.
UPDATE: This article has been superseded by Setting up R on macOS 10.15 Catalina (Complete Guide)
In my previous post Setting up R for Minimal Code Compilation and Maximum Speed, I discussed in detail how to set up R so that when you build from source, you can build against the OpenMP library. I was using macOS 10.14 Mojave. With the release of macOS Catalina, something had to break, right?
When Apple released Xcode 10, the release notes included a workaround for compilers that were looking for header files at /usr/include. It also came with a warning that in a future release, it would no longer be provided.
The command line tools will search the SDK for system headers by default. However, some software may fail to build correctly against the SDK and require macOS headers to be installed in the base system under /usr/include. If you are the maintainer of such software, we encourage you to update your project to work with the SDK or file a bug report for issues that are preventing you from doing so. As a workaround, an extra package is provided which will install the headers to the base system. In a future release, this package will no longer be provided.
True to Apple, without much delay, the workaround is gone. /usr/include is no longer allowed, which is where clang searches for header files by default. But fear not, after some trial and error, with a few configuration changes, you can get back on track.
Install Command Line Tools
If you have Xcode already installed, you should not need to install the Command Line Tools separately as Xcode already includes them. Otherwise, you can install them like this:
You can always check to see if they are already installed first:
Test OpenMP with Clang
Ensure clang knows where to find the macOS SDK. You can include something like this in your ~/.bash_profile (if you use bash) or ~/.zshrc file (if you use zsh). Note that Catalina’s default shell is now Zsh.
As before, test to make sure you can build a small test program that uses multiple cores via OpenMP.
OpenMP from R
I’ve also updated my Makevars script so that clang can find the macOS SDK header files. Adjust your ~/.R/Makevars file accordingly.
C/C++
Now, try building from R. A good test is the data.table package. Uninstall it first, if it’s already installed.
Then, install it from source:
If R installs it without error, you’re back in business. However, you should reinstall this package from the CRAN binaries unless you have a good reason not, so that you get optimal performance.
Fortran
You can also test to make sure your configuration can build Fortran code against the OpenMP libraries by installing an appropriate R package, e.g.: bayesQR.
Install Xcode Macos Catalina Update
Conclusion
How To Install Xcode On Catalina
So far, Catalina hasn’t been a major disruption to the R workflow as far as I can tell, even though each new version of macOS and Xcode usually breaks something. For now, crisis averted. And while I always like to keep my R setup configured to build from source just in case, I always advocate installing from binaries when possible.