Developer Mode
What is Developer Mode?
Chrome OS Developer Mode is meant for advanced users and allows them to tweak their devices by installing apps that aren't in the Play Store, entering advanced settings, and replacing the operating system. It's called Developer Mode because only people who know what they're doing, such as developers, should enable and use it. It can be used to sideload Android apps using APKs and install Linux distributions and Linux apps. Some consequences could result from using Developer Mode without the proper knowledge, so tread carefully. One drawback is that you might void your Chrome OS device's warranty. Most warranties cover normal usage, and Developer Mode technically doesn't fall under normal use. To make sure your warranty stays intact, double-check the language from your device's manufacturer before turning it on. Also, when you turn on your device with Developer Mode enabled, you'll see a warning screen letting you know it's in Developer Mode. Another drawback is that the files on your device are inaccessible when in Developer Mode. To avoid issues, copy the files you need from your regular account and bring them into your account once developer mode is enabled. You can lose all the files on your normal account by activating Developer Mode. If you decide to use Developer Mode, back up your files so that you don't lose anything you need. Additionally, and perhaps most importantly, the normal security features are disabled, so you are fully vulnerable to malware and other cyberattacks. Only those who know how to keep safe on the internet should use Developer mode so that their important data isn't stolen.
Credit: https://www.androidpolice.com/how-to-enter-chromeos-developer-mode/
The Settings app on Android includes a screen called Developer options where you can configure system behaviors that help you profile and debug your app performance. For example, you can enable debugging over USB, capture a bug report, enable visual feedback for taps, flash window surfaces when they update, use the GPU for 2D graphics rendering, and more.
Credit: https://developer.android.com/studio/debug/dev-options
Developer Mode, available in iOS 16 and later, watchOS 9 and later, and visionOS, protects people from inadvertently installing potentially harmful software on their devices, and reduces attack vectors exposed by developer-only functionality. The feature doesn’t affect ordinary installation techniques like buying apps from the App Store, or participating in a TestFlight team. Instead, Developer Mode focuses on scenarios like performing a Build and Run in Xcode, or installing an .ipa file with Apple Configurator. In these cases, the device explicitly asks the person using it to confirm that they’re a developer, aware of the risks of installing development-signed software.
Credit: https://developer.apple.com/documentation/xcode/enabling-developer-mode-on-a-device
Developer Mode replaces the Windows 8.1 requirements for a developer license. In addition to sideloading, the Developer Mode setting enables debugging and additional deployment options. This includes starting an SSH service to allow deployment to this device. In order to stop this service, you need to disable Developer Mode.
When you enable Developer Mode on desktop, a package of features is installed, including:
Windows Device Portal: Device Portal is only enabled (and firewall rules are only configured for it) when the Enable Device Portal option is turned on.
Installs and configures firewall rules for SSH services that allow remote installation of apps. Enabling Device Discovery will turn on the SSH server.
Credit: https://learn.microsoft.com/en-us/windows/apps/get-started/enable-your-device-for-development
Configuring Developer Mode On iOS
In the Settings app, navigate to Privacy & Security > Developer Mode
Enable the toggle—Press Restart to do so. You will receive a prompt from iOS to restart your device
After the device restarts, unlock your device; a system alert should appear. Press Turn On, and then, when prompted, enter your passcode
Developer Mode is now enabled, and you can run internal and local distribution builds.
You can turn off Developer Mode anytime, but note that you'll need to follow this process again to re-enable it.
Credit: https://help.testapp.io/faq/enable-developer-mode-ios/
Disabling Developer Mode on iOS
Go to Settings > Privacy & Security > Developer Mode to show the Developer Mode toggle switch and untoggle the switch.
Credit: https://developer.apple.com/documentation/xcode/enabling-developer-mode-on-a-device
Configuring Developer Mode On ChromeOS
Reboot your Chromebook.
While your Chromebook is restarting, simultaneously hold the Power+Esc+Refresh keys.
Press and hold the Ctrl+D keys at the same time when the "ChromeOS is missing or damaged. Please insert USB stick" message pops up.
A message may appear asking about OS verification. If so, press Enter.
Your device restarts and sets up Developer Mode.
Press Ctrl+D when a screen displays OS verification is off.
Now you're in Developer Mode and have access to the additional functionality.
Disabling Developer Mode on ChromeOS
Sometimes, you may want to switch back to regular Google Chrome OS device functionality after using Developer Mode. Before you do so, make sure to back up all your files.
Shut down your Chromebook.
Press the power button to power on your Chromebook.
Press the space bar when the OS verification is off message pops up.
The Chromebook factory resets and completes the regular setup process.
After that, your Chromebook should now be back to its usual functionality.
Credit: https://www.androidpolice.com/how-to-enter-chromeos-developer-mode/?newsletter_popup=1
Configuring Developer Mode On Android Phone
Go to Settings > About phone
Scroll down to Build number.
Tap Build number seven times. After the first few taps, you should see the steps counting down until you unlock the developer options. You may also have to tap in your PIN for verification
Once developer options are activated, you will see a message that reads, You are now a developer.
Go back to the Settings pane and head to System, where you will now find Developer options as an entry.
Tap it and toggle the switch on if it is not already, and from there, you can proceed to make adjustments to your phone. (You can unlock the developer options on any Android smartphone or tablet by locating the build number in your Settings menu and tapping it multiple times. However, the exact location of the aforementioned build number may differ depending on your phone’s manufacturer. In most modern Android smartphones, though, like the Samsung Galaxy S23 Ultra, you can search Settings for "Build number" if you're really struggling.)
Disabling Developer Mode on Android Phone
It’s simple to deactivate developer options straight from your Settings menu if you don’t need to access them anymore.
Head over to Settings > System and click Developer options.
Hit the toggle to Off. After a restart, you’re done.
Yes, really. That’s all there is to it. After you’ve completed this step, you will no longer be able to access Developer options from the Settings menu. You can still modify these settings later if you change your mind and want to return them to their initial state. Simply follow the directions mentioned above.
Credit: https://www.digitaltrends.com/mobile/how-to-get-developer-options-on-android/
Configuring Developer Mode On Samsung Galaxy
Go to "Settings"
Tap "About device" or "About phone"
Tap “Software information”
Tap “Build number” seven times (Depending on your device and operating system, you may not need to follow step number 3.)
Enter your pattern, PIN or password to enable the Developer options menu
The "Developer options" menu will now appear in your Settings menu (Depending on your device, it may appear under Settings > General > Developer options.)
Disabling Developer Mode on Samsung Galaxy
To disable the Developer options menu, tap the switch