Remove the Xcode application. First thing to do is to remove the Xcode.app located in /Applicationswhich is taking up a huge amount of space. This is pretty easy, just move it to trash and empty your trash. Update Xcode’s path. After you remove the Xcode.app, your homebrew will have trouble finding all the command binaries. Install Xcode command line tools, Homebrew, and Git on macOS. Install the following apps on your mac running macOS: (standalone) Xcode Command Line Tools. Homebrew is a packaging system for OS X which makes installing (and keeping them updated) many of these bits of software easy. Install Xcode¶ To start with, we need to install Overview¶ Sometimes you want to install software that is typically categorized as F/OSS (Free, or Open Source Software).
THIS PAGE HAS BEEN DEPRECATED. SEE THE SPRING 2015 SITE.
Installing G++ on a Mac
This section is intended to get you quickly started with C++ programming on your Mac. We'll be installing GCC 4.8.1 and GDB through a tool called Homebrew. If you want an additional guide on all of the following steps (except for installing GCC), the one by Moncef Belyamani is quite helpful. When you follow it, ignore anything about installing Ruby; that is, stop after setting up git.
Homebrew
Homebrew 'installs the stuff that you need that Apple don't'. It's like Ubuntu's apt-get, where one can install packages easily from repositories. Instead of having to download, configure, and install something yourself, all you need to do is run one command, and Homebrew will take care of the rest for you.
Pre-requisites
Homebrew requires that you have either Xcode or the Xcode command line tools installed on your Mac. Xcode is a free integrated development environment similar to Eclipse designed by Apple and mainly intended for iOS development or targeting the
clang
compiler. In this class, we will focus on gcc
.Xcode is quite a big install, so if you do not want to install it, you can get away with just installing the Xcode command line tools. See a Stackoverflow discussion for instructions on how to install the command line tools regardless of whether you have Xcode installed.
Installing Homebrew
You need xcode command line tools to install Homebrew. It is very easy to install Homebrew. Open your terminal, and run the following command:
If this doesn't seem to do anything, try killing it (CTRL C) and running it again. Or checkout homebrew website.
GCC and GDB
Installing GCC
First of all, you should make sure that your Homebrew is up-to-date. Check to see if it is so with the following:
As mentioned before, installing packages with Homebrew is very easy. First, we will add the repository from which the GCC package is available, so that Homebrew knows where to find the package we want. The repository is at https://github.com/Homebrew/homebrew-versions.
We do this by using the
brew-tap
command. Keep your terminal open, and run the following command. (For more information on how brew-tap works, visit the Homebrew docs):Next, we will actually install the GCC package. Run the following command:
It might take long time before the installation is complete. If you run into any issues, you can debug with:
When done, run the following:
The result should look like this:
USC Wireless Warning
Many people have had issues running the
brew install
commands while connected to USC Wireless. If you are having trouble, you can either try using a wired connection, a different wireless connection, or do the following:- Download a homebrew cache
- Open Finder, press CMD (command) + SHIFT + G and type
/Library/Caches/Homebrew
- Extract the contents of the .zip you downloaded inside of the folder you opened in the previous step. Do not extract any of the .tar.bz2 or .tar.gz inside of the .zip folder.This should look as follows:
- Run
brew install gcc48
in the Terminal as instructed above.
Using G++
To compile with the newly installed G++ compiler, use
g++-4.8
. (Advanced) Aliasing g++
If you prefer calling g++ directly, you can also create a bash alias, as follows:
Put these two lines at the end of the file
~/.bashrc
, and run:source ~/.bashrc
For more information on bash alias, take a look at the GNU Docs.
Installing GDB
Here also we use Homebrew. The following instruction has been taken from GDB on OS X Mavericks and Xcode 5 guide. To install, run the following brew command.
Check if it's installed:
The result should be gdb version 7 or higher.
Codesigning gdb
gdb is not going to debug yet. You'll get an error message like 'please check gdb is codesigned'. You need to create a certificate and sign gdb. By doing so you're telling the operating system that gdb is authorized to attach to other processes for debugging purposes. The following instructions have been taken from this Code Signing guide.
- Open application 'Keychain Access' (/Applications/Utilities/Keychain Access.app)
- In Keychain Access, select the 'login' keychain in the 'Keychains' list in the upper left hand corner of the window.
- Open the menu item in /Keychain Access/Certificate Assistant/Create a Certificate...
- Choose a name ('lldb_codesign' in the example, but you can use anything you want), set 'Identity Type' to 'Self Signed Root', and set 'Certificate Type' to 'Code Signing'. Click 'Create'.
- Click continue, continue and done.
- Click on the “My Certificates” category on the left side and double click on the new “lldb_codesign” certificate.
- Open the context menu for 'Trust' (click the triangle) and change the following:
When using this certificate: Always Trust
- Now close this window, and enter your login password to confirm this change.
- Option-drag (this meaning holding the option key down and dragging) the new 'lldb_codesign' certificate from the login keychain to the System keychain in the Keychains pane of the main Keychain Access window to make a copy of this certificate in the System keychain. You'll have to authorize a few more times, set it to be 'Always trusted' when asked.
- Switch to the 'System' keychain and drag a copy of the 'lldb_codesign' you just made onto the Desktop.
- Switch to Terminal and then run the following command (copy paste it!):
sudo security add-trust -d -r trustRoot -p basic -p codeSign -k /Library/Keychains/System.keychain ~/Desktop/lldb_codesign.cer
- Then right click on the 'lldb_codesign' certificate in the 'System' keychain (not 'Login') and select 'delete' to delete it from the 'System' keychain.
- Then reboot your system/computer.
- Finally you can sign gdb:
codesign -s lldb_codesign /usr/local/bin/gdb
- If this command doesn't work...then panic! Just kidding, be sure that you have gdb installed and that gdb is actually installed in /usr/local/bin. You may want to try 'which gdb' in your Terminal to figure out where it is.
- Finally, remove the lldb_codesign.cer file that's sitting on your desktop, and gdb should be working at this point. :)
The easiest way to install a number of Unix style applications and open source software onto macOS Big Sur, Catalina, Mojave and earlier Sierra OS versions is via a package manager, unfortunately, macOS Big Sur doesn’t come with one, but fortunately, some good folks care, they come in the form of Homebrew.
The install of Homebrew also works on macOS Catalina, macOS Mojave, (High)Sierra, El Capitan, and Yosemite, so macOS 10.10 – 10.14
Homebrew isn’t the only option, also available is MacPorts and Fink but Homebrew is the newest and most popular of the trio.
Install Homebrew
To download install Homebrew run the install script on the command line as below and let the script do its thing:
If you don’t have Apples Xcode Command Line Tools installed it will alert you to that it will install it and carry on with the Homebrew installation and download the Command Line Tools you will need to enter your admin password at some point.
Then Homebrew is installed.
After this Homebrew is installed and ready to install other apps.
After this Homebrew is installed and ready to install other apps.
To get started run brew help can give some command example usage.
To check for any issues with the Homebrew install run:
One issue that typically comes up is an outdated or missing version of Xcode.
For the latest macOS, brew doctor will warn that the Homebrew install won’t be 100% if Xcode is not up to date, so update Xcode from the App Store.
To search for an application:
To install
To list all apps installed by Homebrew
To remove an installed application
To update Homebrew itself
To see what packages are out of date but not to upgrade them
To see what upgrade packages all or singular
To hold a package at a certain version
To release a package from a certain version
To see what else you can do
Where does Homebrew install stuff …. in the Cellar
Reinstall Xcode Command Line Tools
Where the brew lives.
You can see your Homebrew configuration by running
The output should be similar to …
All installations via Homebrew are filed independently in the filing system in /usr/local/Cellar and linked into /usr/local/bin which is a directory which allows you to run these commands and apps as if part of the regular operating system.
This directory is also out of the SIP bounds so there should be no authentication macOS error dialog boxes.
Remove Home-brew and all packages
To remove the Home-brew installation and all packages it has installed..
Brew Xcode Command Line Tools
HomeBrew is a great package manager just start installing some apps and explore.!