The safest place to get apps for your Mac is the App Store. Apple reviews each app in the App Store before it’s accepted and signs it to ensure that it hasn’t been tampered with or altered. If there’s ever a problem with an app, Apple can quickly remove it from the store.
If you download and install apps from the internet or directly from a developer, macOS continues to protect your Mac. When you install Mac apps, plug-ins, and installer packages from outside the App Store, macOS checks the Developer ID signature to verify that the software is from an identified developer and that it has not been altered. By default, macOS Catalina also requires software to be notarized, so you can be confident that the software you run on your Mac doesn't contain known malware. Before opening downloaded software for the first time, macOS requests your approval to make sure you aren’t misled into running software you didn’t expect.
By default, Mac OS X Mountain Lion, Mavericks, Yosemite and El Capitan (10.8 - 10.11) includes a security feature called Gatekeeper. Gatekeeper will check the security settings on Mac OS X and see what apps are allowed to launch. The default setting is to allow apps from the App Store and identified developers that have signed their apps. Unlike pre-macOS Sierra versions, you can now only install apps on your MacBook Pro (running macOS High Sierra at the time of this writing) from the App Store. This not only maintains the integrity and security of your Mac, it also makes the entire installation process quick and hassle-free. Installing apps on your Mac is simple.
Running software that hasn’t been signed and notarized may expose your computer and personal information to malware that can harm your Mac or compromise your privacy. View the app security settings on your Mac
By default, the security and privacy preferences of your Mac are set to allow apps from the App Store and identified developers. For additional security, you can chose to allow only apps from the App Store.
In System Preferences, click Security & Privacy, then click General. Click the lock and enter your password to make changes. Select App Store under the header “Allow apps downloaded from.”
Open a developer-signed or notarized app
If your Mac is set to allow apps from the App Store and identified developers, the first time that you launch a new app, your Mac asks if you’re sure you want to open it.
An app that has been notarized by Apple indicates that Apple checked it for malicious software and none was detected:
Prior to macOS Catalina, opening an app that hasn't been notarized shows a yellow warning icon and asks if you're sure you want to open it:
If you see a warning message and can’t install an app
If you have set your Mac to allow apps only from the App Store and you try to install an app from elsewhere, your Mac will say that the app can't be opened because it was not downloaded from the App Store.*
If your Mac is set to allow apps from the App Store and identified developers, and you try to install an app that isn’t signed by an identified developer or—in macOS Catalina—notarized by Apple, you also see a warning that the app cannot be opened.
If you see this warning, it means that the app was not notarized, and Apple could not scan the app for known malicious software.
You may want to look for an updated version of the app in the App Store or look for an alternative app.
If macOS detects a malicious app
If macOS detects that an app has malicious content, it will notify you when you try to open it and ask you to move it to the Trash.
How to open an app that hasn’t been notarized or is from an unidentified developer
Running software that hasn’t been signed and notarized may expose your computer and personal information to malware that can harm your Mac or compromise your privacy. If you’re certain that an app you want to install is from a trustworthy source and hasn’t been tampered with, you can temporarily override your Mac security settings to open it.
In macOS Catalina and macOS Mojave, when an app fails to install because it hasn’t been notarized or is from an unidentified developer, it will appear in System Preferences > Security & Privacy, under the General tab. Click Open Anyway to confirm your intent to open or install the app.
The warning prompt reappears, and you can click Open.*
The app is now saved as an exception to your security settings, and you can open it in the future by double-clicking it, just as you can any authorized app.
*If you're prompted to open Finder: control-click the app in Finder, choose Open from the menu, and then click Open in the dialog that appears. Enter your admin name and password to open the app.
There is an updated version of this post for OS X 10.9. While the steps below should still work, I recommend checking out the new guide if you are running 10.9!
There are already plenty of guides that explain the particular steps of getting Git and Github going on your mac in detail. However, I had difficulty finding one that explained every step required in order with simple enough instructions for Terminal novices to follow along with autonomously.
So I decided to write one myself. Google photo collage app on mac.
BackgroundMac Pro Change Security Preferences To Allow App Installation System
I enjoy helping people become more efficient and productive, particularly when it comes to their computers and mobile devices. At a recent job, the staff design team was beginning a period of close collaboration with the front-end development team in the interest of achieving the best possible product in the shortest period of time.
However, there was a slight “problem.” The project’s codebase was exclusively managed via Git repositories on Github. Most of the designers had never worked with Git, let alone ever configured it on their workstations.
Most of the designers had some knowledge of the technologies that went into the codebase, particularly presentation layer tech like HTML and CSS. Some even knew programming languages like Javascript, PHP, and Ruby.
In an effort to unleash this previously untapped resource for a round of intense polishing and bug-fixing, I took it upon myself to write a step-by-step guide that any member of our studio could follow and be up and running with developer tools, Git, connected to Github, and ready to work on the project codebase.
This then is a slightly abbreviated1 version of the guide I distributed out to the team. Ultimately just a few days after releasing it, nearly everyone in the office — including design, production, management, and even a few devs setting up new machines — was able to at least view the latest code on their workstations.
Aside from the fact that my guide helped others quickly get through the arduous process of installation and configuration, I was happy to have it as a quick reference for myself when setting up new machines of my own. Enjoy!
Getting started
This tutorial assumes you’re using a Mac running at least OS X 10.7. If you are unsure of what OS you have, go up to the top left of your screen, click the Apple menu, and select “About This Mac.”
You’ll also need to ensure that your user account on your computer has admin privileges and that you know your account’s password.
Install the Command Line Tools for OS X
Xcode is a nearly 4GB developer suite Apple offers for free from the Mac App Store. However, for the purposes of getting Git and Github setup, you’ll only need a specific set of command line tools2 which fortunately take up much less space.
If you don’t mind the 4GB, by all means go for Xcode. Otherwise, you’ll have to go to connect.apple.com and register an Apple Developer account in order to download these tools.
Once you’ve registered, they can be found at developer.apple.com/xcode by clicking on “View downloads” and finding the appropriate command line tools for your version of OS X in the list.
A note about the Terminal
The Terminal application comes pre-installed with OS X, and can be found in the Applications -> Utilities folder. You can also quickly access it using Spotlight.
The terminal has a variety of uses, but for the purposes of this tutorial we’ll be using a syntax/command set called Bash. Terminal is already configured to use this syntax.
When you enter a command and press return/enter, often times the terminal will execute it and complete the task immediately.
Sometimes it will log information in the window while it’s working, but other times you might feel like it isn’t doing anything at all.
Some of the commands later in this tutorial can take a few seconds (or minutes) to complete, so don’t type anything into the terminal window or close the terminal window until you see it present you with a fresh prompt ending in
yourusername$ .
For the purposes of this tutorial, commands that I intend for you to type will be preceded with
$ , but don’t include that symbol when you enter the commands. It’s purely meant as an indicator and reference to the $ that appears in your terminal prompt.
Lines that contain comments/notes from me to will be preceded with
# and will be dimmed. Don’t type these either.
Make sure to press return after typing a command before you enter the next one.
Installing Git
“Git is a free and open source distributed version control system designed to handle everything from small to very large projects with speed and efficiency.”
We need to install Git onto your computer. It won’t have an icon in your dock, but it can be used by the Terminal (and other applications, more on that later).
OS X comes with a fairly old version of Git pre-installed, so we’ll want to make sure that your terminal is using a more updated version.
One specific reason you’ll want to have a newer version of Git than the one that ships with OS X is to take advantage of a nice authentication feature that allows you to seamlessly interact with Github.
Configuring Git identification
Now let’s configure your Git installation so other folks who might be working on projects with you know who’s doing all of the great work coming from your computer.
Setup Github
“GitHub is a web-based hosting service for software development projects that use the Git revision control system.”
Go to Github.com and create a free account if you haven’t already.
Github Keychain Helper
To save time in the future, we’ll install a utility that will allow your computer to authenticate with Github automatically instead of having to enter your username/password during each session.
First, check if the helper is installed by typing
git credential-osxkeychain into the terminal.
If the helper is installed, the terminal will give you instructions on how to use it:
If see the above message, you are now able to access Git repositories using the HTTPS method. There’s a very good chance that this is the only method you will need to access repositories and you can move on to my final notes.
If you don’t have the keychain helper already installed, you’ll see this instead:
To install the keychain helper, execute the following commands:
Once again, if the helper has been installed successfully, the terminal will give you instructions on how to use it:
If see the above message, you are now able to access Git repositories using the HTTPS method. There’s a very good chance that this is the only method you will need to access repositories and you can move on to my final notes.
If you don’t see the above message, you hit a snag along the way. Try going through the keychain helper install steps again.
Otherwise, if you have a specific reason that you need to access Git repositories using SSH, proceed to SSH Keys.
SSH Keys (optional step)
“SSH uses public-key cryptography to authenticate the remote computer and allow it to authenticate the user, if necessary. There are several ways to use SSH; one is to use automatically generated public-private key pairs to simply encrypt a network connection, and then use password authentication to log on.”
An SSH key basically lets your computer uniquely identify itself when it connects to servers. If Github is aware of the key your computer is using, you won’t have to enter your Github username/password every time you connect.
Check for pre-existing SSH keys on your computer
Let’s see if your computer has one or more keys already installed:
If you get the response “No such file or directory”, skip to Generate a new SSH Key.
Otherwise, you’ll need to backup and remove your existing SSH keys.
Backup and remove your existing SSH keys.Generate a new SSH key
Now we’ll create a new SSH key to use with Github.
When it asks you to enter a file name in which to save the key, just press return/enter (leave the prompt blank).
You will then be asked to enter a passphrase and confirm it. Don’t make this blank, and don’t make it an easily guessable. This prevents someone from easily acquiring and using your SSH key to impersonate you. Don’t worry, you won’t have to enter this key much (if at all) after initial setup.
Press return after each time you’ve entered your selected passphrase. You won’t see the characters or bullets, the cursor will stay in the same spot as if you aren’t typing.
If you make an error entering your password one of the times, just press return and it will prompt you to try again.
Once you’ve successfully set your passphrase, the terminal will report that your key has been saved and will present you with some sweet ASCII art.
Add your SSH key to Github
In order for your computer to access Github without you having to enter your username/password all the time, Github needs to know the contents of the SSH key you just generated.
Now we’ll add your key to Github:
Now let’s test that it all worked.
Congratulations!
Your Mac is now up and running with both Git and Github. I intend to write another post about some of the commonly used commands I always find myself looking up syntax for, as well as those that members on the team had to learn in order to effectively take part in the production process.
Recommended toolsText Editors
If you’re just getting your feet wet with writing code, you’ll want to look into a text editor that is purpose built for that task.
Mac Pro Change Security Preferences To Allow App Installation Windows 10
My hardcore colleagues wouldn’t leave me alone if I didn’t also mention command-line editors like Vim and Emacs, but I’d recommend one of the previously listed apps for getting started.
Mac Pro Change Security Preferences To Allow App Installation Tool
I don’t recommend using TextEdit as it doesn’t offer syntax highlighting, and I’m personally not fond of Dreamweaver for writing code as I feel it allows its WYSIWYG mode to be used as a crutch. That said, Dreamweaver’s predecessor4 in Adobe’s product lineup was what I learned to write HTML on, so there’s that.
However with the explosion of online code teaching platforms out there (and Firebug/DOM inspector tools), I don’t see the need to use a WYSIWYG editor anymore.
Git GUI Tools
When I first started dabbling with Git, I used the popular Tower app to manage my repositories. It has a fantastic interface and offers most of the features of the command line app.
However when we began this endeavor at my past job, the development team and I wanted to ensure that all persons with access to the codebase thought about what the actions they were going to take, and deliberately execute commands.
GUI tools are great, but they can sometimes allow disastrous things to happen with the push of a button. Additionally they can abstract away the syntax of the language/protocol they are built upon, and as a result leave users dependent on the GUI rather than knowledgeable about the underlying technology.
If you must use a GUI tool, by all means do. However in the circumstances I mentioned, it wasn’t an option we wanted to offer.
Terminal Configuration
I’ve been enjoying iTerm2 for a few small perks it offers, mainly the ability to have perfect representation of the Solarized Dark theme.
Feedback
If there are any steps/instructions I’ve written that have been outdated by newer information/technology, are simply wrong, or could be explained better please feel free to contact me on Twitter where I’m @burnedpixel.
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