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macOS (previously known as OS X or Mac OS X) is Apple's operating system for the Mac line of computers. It's a UNIX platform, based on the Darwin kernel, and behaves largely similar to other UNIX-like platforms. The main difference is that X11 is not used as the windowing system. Instead, macOS uses its own native windowing system that is accessible through the Cocoa API.

To download and install Qt for macOS, follow the instructions on the Getting Started with Qt page.

Supported Versions

When talking about version support on macOS, it's important to distinguish between the build environment; the platform you're building on or with, and the target platforms; the platforms you are building for. The following macOS versions are supported.

# On Windows python -m pip install -U pip setuptools # On OS X or Linux pip install -U pip setuptools. Once you have pip, you can just run # Python2 pip install jupyter # Python 3 pip3 install jupyter. If you need more information about installing packages in Python, you can go to this page. Running Jupyter Notebooks in Docker Containers. This creates the directory /tmp/qt-everywhere-opensource-src-%VERSION% containing the files from the archive. Step 2: Build the Qt Library. To configure the Qt library for your machine type, run the./configure script in the package directory.

1. Package List APScheduler-3.5.3 In-process task scheduler with Cron-like capabilities AnyQt-0.0.10 PyQt4/PyQt5 compatibility layer. Babel-2.6.0 Internationalization utilities CacheControl-0.12.5 httplib2 caching for requests ConfigArgParse-0.13.0 A drop-in replacement for argparse that allows options to also be set via config files and/or environment variables. Cycler-0.10.0 Composable style.
2. MacOS (previously known as OS X or Mac OS X) is Apple's operating system for the Mac line of computers. It's a UNIX platform, based on the Darwin kernel, and behaves largely similar to other UNIX-like platforms. The main difference is that X11 is not used as the windowing system.
3. Jupyter Notebook is a powerful tool for data analysis. Here are 28 tips, tricks, and shortcuts to turn you into a Jupyter notebooks power user!
4. These instructions are suitable for Windows, Mac OS X, and Linux platforms. I will demonstrate them on OS X, so you may see some mac dialogs and file extensions. Discover how to prepare data with pandas, fit and evaluate models with scikit-learn, and more in my new book, with 16 step-by-step tutorials, 3 projects, and full python code.

Build Environment

The build environment on macOS is defined entirely by the Xcode version used to build your application. Xcode contains both a toolchain (compiler, linker, and other tools), and a macOS platform-SDK (headers and libraries). Together these define how your application is built.

Note: The version of macOS that you are running Xcode on does not matter. As long as Apple ships a given Xcode version that runs on your operating system, the build environment will be defined by that Xcode version.

Xcode can be downloaded from Apple's developer website (including older versions of Xcode). Once installed, choosing an Xcode installation is done using the xcode-select tool.

You can inspect the globally selected Xcode installation using the same tool.

The xcrun command can then be used to find a particular tool in the toolchain.

or show the platform SDK path used when building.

Target Platforms

Building for macOS utilizes a technique called weak linking that allows you to build your application against the headers and libraries of the latest platform SDK, while still allowing your application to be deployed to macOS versions lower than the SDK version. When the binary is run on a macOS version lower than the SDK it was built with, Qt will check at runtime whether or not a platform feature is available before utilizing it.

In theory this would allow running your application on every single macOS version released, but for practical (and technical) reasons there is a lower limit to this range, known as the deployment target of your application. If the binary is launched on a macOS version below the deployment target macOS or Qt will give an error message and the application will not run.

Qt expresses the deployment target via the QMAKE_MACOSX_DEPLOYMENT_TARGET qmake variable, which has a default value set via the makespec for macOS. You should not need to change this default, but if needed you can increase it in your project file:

Note: You should not lower the deployment target beyond the default value set by Qt. Doing so will likely lead to crashes at runtime if the binary is then deployed to a macOS version lower than what Qt expected to run on.

By always building against the latest available platform SDK, you ensure that Qt can take advantage of new features introduced in recent versions of macOS.

For example, you can choose between a digital or an analogue clock and there are even versions of the screensaver available for not just a Windows-based PC, but also for the Macintosh as well. The default screensavers typically included in normal installations of Windows are generally boring, simplistic and monotonous, but this one will truly bring your monitor to life as well as helping to dramatically lower the risk of screen burn-in. It includes a clock and a calendar and various options for further customization. You can find a number of other screensavers available on this site as well. Screensavers for mac. With a highly detailed scenery and beautiful, colorful graphics, this train screensaver is one of the best choices of the great screensavers from 3D signal.

For more information about SDK-based development on macOS, see Apple's developer documentation.

Opting out of macOS behavior changes

One caveat to using the latest Xcode version and SDK to build your application is that macOS's system frameworks will sometimes decide whether or not to enable behavior changes based on the SDK you built your application with.

For example, when dark-mode was introduced in macOS 10.14 Mojave, macOS would only treat applications built against the 10.14 SDK as supporting dark-mode, and would leave applications built against earlier SDKs with the default light mode look. This technique allows Apple to ensure that binaries built long before the new SDK and operating system was released will still continue to run without regressions on new macOS releases.

A consequence of this is that if Qt has problems dealing with some of these macOS features (dark-mode, layer-backed views), the only way to opt out of them is building with an earlier SDK (the 10.13 SDK, available through Xcode 9). This is a last-resort solution, and should only be applied if your application has no other ways of working around the problem.

Architectures

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By default, Qt is built for x86_64. To build for x86_64h (Haswell). use the QMAKE_APPLE_DEVICE_ARCHSqmake variable. This is selectable at configure time:

QMAKE_APPLE_DEVICE_ARCHS can also be specified as a space-delimited list in order to build for multiple architectures simultaneously:

Additional Command-Line Options

On the command-line, applications can be built using qmake and make. Optionally, qmake can generate project files for Xcode with -spec macx-xcode. If you are using the binary package, qmake generates Xcode projects by default; use -spec macx-gcc to generate makefiles. For example:

Configuring with -spec macx-xcode generates an Xcode project file from project.pro. With qmake you do not have to worry about rules for Qt's preprocessors (moc and uic) since qmake automatically handles them and ensures that everything necessary is linked into your application.

Qt does not entirely interact with the development environment (for example plugins to set a file to 'mocable' from within the Xcode user interface).

The result of the build process is an application bundle, which is a directory structure that contains the actual application executable. The application can be launched by double-clicking it in Finder, or by referring directly to its executable from the command line, for example, myApp.app/Contents/MacOS/myApp.

If you wish to have a command-line tool that does not use the GUI for example, moc, uic or ls, you can tell qmake to disable bundle creation from the CONFIG variable in the project file:

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Deploying Applications on macOS

macOS applications are typically deployed as self-contained application bundles. The application bundle contains the application executable as well as dependencies such as the Qt libraries, plugins, translations and other resources you may need. Third party libraries like Qt are normally not installed system-wide; each application provides its own copy.

A common way to distribute applications is to provide a compressed disk image (.dmg file) that the user can mount in Finder. The deployment tool, macdeployqt (available from the macOS installers), can be used to create the self-contained bundles, and optionally also create a .dmg archive. Applications can also be distributed through the Mac App Store. Qt 5 aims to stay within the app store sandbox rules. macdeployqt (bin/macdeployqt) can be used as a starting point for app store deployment.

Note: For selling applications in the macOS App Store, special rules apply. In order to pass validation, the application must verify the existence of a valid receipt before executing any code. Since this is a copy protection mechanism, steps should be taken to avoid common patterns and obfuscate the code that validates the receipt as much as possible. Thus, this cannot be automated by Qt, but requires some platform-specific code written specifically for the application itself. More information can be found in Apple's documentation.

macOS Issues

The page below covers specific issues and recommendations for creating macOS applications.

Where to Go from Here

We invite you to explore the rest of Qt. We prepared overviews to help you decide which APIs to use and our examples demonstrate how to use our API.

• Qt Overviews - list of topics about application development
• Examples and Tutorials - code samples and tutorials
• Qt Reference Pages - a listing of C++ and QML APIs

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Qt's vibrant and active community site, http://qt.io houses a wiki, a forum, and additional learning guides and presentations.

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