Xcode Version For El Capitan

Xcode has a project setting for 'iOS Deployment', where you can choose that same (Xcode max) or lower iOS version that app can support. Of course you'll need a device with that lower IOS in order to use an older Xcode. Details may be involved that require certain app specifics, tho, so be prepared to meet them.
OS X El Capitan 10.11 is available to consumers via the public beta program. Last is the fourth beta of Xcode 7. Xcode 7 beta 4 includes SDKs for watchOS 2.0, iOS 9 and OS X version 10.11. The primary new features of Xcode 7 beta 4 are a revised interface builder and testing tool.
We will be using the latest version of Apple’s Xcode 11 to program iOS 13 apps and run our apps in Xcode’s built in iOS simulator. Yosemite, El Capitan, Sierra etc.
Download Xcode for macOS 10.15.4 or later and enjoy it on your Mac. ‎Xcode includes everything developers need to create great applications for Mac, iPhone, iPad, Apple TV, and Apple Watch. Xcode provides developers a unified workflow for user interface design, coding, testing, and debugging. Download and Install Xcode.

Without Googling, as far as I know, the answer is NO. What hinders you to upgrade to MacOS Sierra though??

Note: CRAN does not have Mac OS X systems and cannot check these binaries for viruses.Although we take precautions when assembling binaries, please use the normal precautions with downloaded executables.

Package binaries for R versions older than 3.2.0 are only available from the CRAN archive so users of such versions should adjust the CRAN mirror setting (https://cran-archive.r-project.org) accordingly.

R 4.0.4 'Lost Library Book' released on 2021/02/15

This directory contains binaries for a base distribution and packages to run on Mac OS X (release 10.6 and above). Mac OS 8.6 to 9.2 (and Mac OS X 10.1) are no longer supported but you can find the last supported release of R for these systems (which is R 1.7.1) here. Xcode 12 even includes a porting tool to streamline the process. The new Extensions category on the Mac App Store showcases Safari extensions, with editorial spotlights and top charts to help users discover and download great extensions from the developer community. Learn about Safari extensions. Machine Learning. XCode is an incredibly powerful toolkit for app development. It’s also refreshingly easy to use, especially for developers accustomed to cumbersome and complicated programming software for PC. Learn more about how to use XCode by reading our iOS programming tutorial.

Please check the SHA1 checksum of the downloaded image to ensure that it has not been tampered with or corrupted during the mirroring process. For example type
openssl sha1 R-4.0.4.pkg
in the Terminal application to print the SHA1 checksum for the R-4.0.4.pkg image. On Mac OS X 10.7 and later you can also validate the signature using
pkgutil --check-signature R-4.0.4.pkg

Latest release:

R-4.0.4.pkg (notarized and signed) SHA1-hash: 0b2b3bc846f6ebc72a8bc0b53e6e85d600d95deb (ca. 85MB)	R 4.0.4 binary for macOS 10.13 (High Sierra) and higher, signed and notarized package. Contains R 4.0.4 framework, R.app GUI 1.74 in 64-bit for Intel Macs, Tcl/Tk 8.6.6 X11 libraries and Texinfo 6.7. The latter two components are optional and can be ommitted when choosing 'custom install', they are only needed if you want to use the `tcltk` R package or build package documentation from sources. Note: the use of X11 (including `tcltk`) requires XQuartz to be installed since it is no longer part of OS X. Always re-install XQuartz when upgrading your macOS to a new major version. Also please do not install beta versions of XQuartz (even if offered). This release supports Intel Macs, but it is also known to work using Rosetta2 on M1-based Macs. Native Apple silicon binary is expected for R 4.1.0 if support for Fortran sabilizes, for experimental builds and updates see mac.R-project.org. Important: this release uses Xcode 12.4 and GNU Fortran 8.2. If you wish to compile R packages from sources, you will need to download GNU Fortran 8.2 - see the tools directory.
NEWS (for Mac GUI)	News features and changes in the R.app Mac GUI
Mac-GUI-1.74.tar.gz SHA1-hash: 2c791fd1fd2d8f90b0887c1f9541882200a6eab8	Sources for the R.app GUI 1.74 for Mac OS X. This file is only needed if you want to join the development of the GUI, it is not intended for regular users. Read the INSTALL file for further instructions.
Note: Previous R versions for El Capitan can be found in the el-capitan/base directory. Binaries for legacy OS X systems:
R-3.6.3.nn.pkg (signed) SHA1-hash: c462c9b1f9b45d778f05b8d9aa25a9123b3557c4 (ca. 77MB)	R 3.6.3 binary for OS X 10.11 (El Capitan) and higher, signed package. Contains R 3.6.3 framework, R.app GUI 1.70 in 64-bit for Intel Macs, Tcl/Tk 8.6.6 X11 libraries and Texinfo 5.2. The latter two components are optional and can be ommitted when choosing 'custom install', they are only needed if you want to use the `tcltk` R package or build package documentation from sources.
R-3.3.3.pkg MD5-hash: 893ba010f303e666e19f86e4800f1fbf SHA1-hash: 5ae71b000b15805f95f38c08c45972d51ce3d027 (ca. 71MB)	R 3.3.3 binary for Mac OS X 10.9 (Mavericks) and higher, signed package. Contains R 3.3.3 framework, R.app GUI 1.69 in 64-bit for Intel Macs, Tcl/Tk 8.6.0 X11 libraries and Texinfo 5.2. The latter two components are optional and can be ommitted when choosing 'custom install', it is only needed if you want to use the `tcltk` R package or build package documentation from sources. Note: the use of X11 (including `tcltk`) requires XQuartz to be installed since it is no longer part of OS X. Always re-install XQuartz when upgrading your OS X to a new major version.
R-3.2.1-snowleopard.pkg MD5-hash: 58fe9d01314d9cb75ff80ccfb914fd65 SHA1-hash: be6e91db12bac22a324f0cb51c7efa9063ece0d0 (ca. 68MB)	R 3.2.1 legacy binary for Mac OS X 10.6 (Snow Leopard) - 10.8 (Mountain Lion), signed package. Contains R 3.2.1 framework, R.app GUI 1.66 in 64-bit for Intel Macs. This package contains the R framework, 64-bit GUI (R.app), Tcl/Tk 8.6.0 X11 libraries and Texinfop 5.2. GNU Fortran is NOT included (needed if you want to compile packages from sources that contain FORTRAN code) please see the tools directory. NOTE: the binary support for OS X before Mavericks is being phased out, we do not expect further releases!

The new R.app Cocoa GUI has been written by Simon Urbanek and Stefano Iacus with contributions from many developers and translators world-wide, see 'About R' in the GUI.

Subdirectories:

tools	Additional tools necessary for building R for Mac OS X: Universal GNU Fortran compiler for Mac OS X (see R for Mac tools page for details).
base	Binaries of R builds for macOS 10.13 or higher (High Sierra)
contrib	Binaries of package builds for macOS 10.13 or higher (High Sierra)
el-capitan	Binaries of package builds for OS X 10.11 or higher (El Capitan build)
mavericks	Binaries of package builds for Mac OS X 10.9 or higher (Mavericks build)
old	Previously released R versions for Mac OS X

You may also want to read the R FAQ and R for Mac OS X FAQ. For discussion of Mac-related topics and reporting Mac-specific bugs, please use the R-SIG-Mac mailing list.

Information, tools and most recent daily builds of the R GUI, R-patched and R-devel can be found at http://mac.R-project.org/. Please visit that page especially during beta stages to help us test the Mac OS X binaries before final release!

Package maintainers should visit CRAN check summary page to see whether their package is compatible with the current build of R for Mac OS X.

Binary libraries for dependencies not present here are available from http://mac.R-project.org/libs and corresponding sources at http://mac.R-project.org/src.

Last modified: 2021/02/15, by Simon Urbanek

Quickstart

Install Xcode and the Xcode Command Line Tools
Agree to Xcode license in Terminal: sudo xcodebuild -license
Install MacPorts for your version of the Mac operating system:

El Capitan Xcode Version

Installing MacPorts

MacPorts version 2.6.4 is available in various formats for download and installation (note, if you are upgrading to a new major release of macOS, see the migration info page):

“pkg” installers for Big Sur, Catalina, Mojave, and High Sierra, for use with the macOS Installer. This is the simplest installation procedure that most users should follow after meeting the requirements listed below. Installers for legacy platforms Sierra, El Capitan, Yosemite, Mavericks, Mountain Lion, Lion, Snow Leopard, Leopard and Tiger are also available.
In source form as either a tar.bz2 package or a tar.gz one for manual compilation, if you intend to customize your installation in any way.
Git clone of the unpackaged sources, if you wish to follow MacPorts development.
The selfupdate target of the port(1) command, for users who already have MacPorts installed and wish to upgrade to a newer release.

Checksums for our packaged downloads are contained in the corresponding checksums file.

The public key to verify the detached GPG signatures can be found under the attachments section on jmr's wiki page. (Direct Link).

Please note that in order to install and run MacPorts on macOS, your system must have installations of the following components:

Apple's Xcode Developer Tools (version 12.2 or later for Big Sur, 11.3 or later for Catalina, 10.0 or later for Mojave, 9.0 or later for High Sierra, 8.0 or later for Sierra, 7.0 or later for El Capitan, 6.1 or later for Yosemite, 5.0.1 or later for Mavericks, 4.4 or later for Mountain Lion, 4.1 or later for Lion, 3.2 or later for Snow Leopard, or 3.1 or later for Leopard), found at the Apple Developer site, on your Mac operating system installation CDs/DVD, or in the Mac App Store. Using the latest available version that will run on your OS is highly recommended, except for Snow Leopard where the last free version, 3.2.6, is recommended.
Apple's Command Line Developer Tools can be installed on recent OS versions by running this command in the Terminal:
Older versions are found at the Apple Developer site, or they can be installed from within Xcode back to version 4. Users of Xcode 3 or earlier can install them by ensuring that the appropriate option(s) are selected at the time of Xcode's install ('UNIX Development', 'System Tools', 'Command Line Tools', or 'Command Line Support').
Xcode 4 and later users need to first accept the Xcode EULA by either launching Xcode or running:
(Optional) The X11 windowing environment for ports that depend on the functionality it provides to run. You have multiple choices for an X11 server:
- Install the xorg-server port from MacPorts (recommended).
- The XQuartz Project provides a complete X11 release for macOS including server and client libraries and applications. It has however not been updated since 2016.
- Apple's X11.app is provided by the “X11 User” package on older OS versions. It is always installed on Lion, and is an optional installation on your system CDs/DVD with previous OS versions.

macOS Package (.pkg) Installer

The easiest way to install MacPorts on a Mac is by downloading the pkg or dmg for Big Sur, Catalina, Mojave, High Sierra, Sierra, El Capitan, Yosemite, Mavericks, Mountain Lion, Lion, Snow Leopard, Leopard or Tiger and running the system's Installer by double-clicking on the pkg contained therein, following the on-screen instructions until completion.

This procedure will place a fully-functional and default MacPorts installation on your host system, ready for usage. If needed your shell configuration files will be adapted by the installer to include the necessary settings to run MacPorts and the programs it installs, but you may need to open a new shell for these changes to take effect.

The MacPorts “selfupdate” command will also be run for you by the installer to ensure you have our latest available release and the latest revisions to the “Portfiles” that contain the instructions employed in the building and installation of ports. After installation is done, it is recommended that you run this step manually on a regular basis to to keep your MacPorts system always current:

At this point you should be ready to enjoy MacPorts!

Type “man port” at the command line prompt and/or browse over to our Guide to find out more information about using MacPorts. Help is also available.

Xcode For El Capitan

Source Installation

If on the other hand you decide to install MacPorts from source, there are still a couple of things you will need to do after downloading the tarball before you can start installing ports, namely compiling and installing MacPorts itself:

“cd” into the directory where you downloaded the package and run “tar xjvf MacPorts-2.6.4.tar.bz2” or “tar xzvf MacPorts-2.6.4.tar.gz”, depending on whether you downloaded the bz2 tarball or the gz one, respectively.
Build and install the recently unpacked sources:
- cd MacPorts-2.6.4
- ./configure && make && sudo make install
Optionally:
- cd ./
- rm -rf MacPorts-2.6.4*

These steps need to be perfomed from an administrator account, for which “sudo” will ask the password upon installation. This procedure will install a pristine MacPorts system and, if the optional steps are taken, remove the as of now unnecessary MacPorts-2.6.4 source directory and corresponding tarball.

To customize your installation you should read the output of “./configure --help more” and pass the appropriate options for the settings you wish to tweak to the configuration script in the steps detailed above.

You will need to manually adapt your shell's environment to work with MacPorts and your chosen installation prefix (the value passed to configure's --prefix flag, defaulting to /opt/local):

Add ${prefix}/bin and ${prefix}/sbin to the start of your PATH environment variable so that MacPorts-installed programs take precedence over system-provided programs of the same name.
If a standard MANPATH environment variable already exists (that is, one that doesn't contain any empty components), add the ${prefix}/share/man path to it so that MacPorts-installed man pages are found by your shell.
For Tiger and earlier only, add an appropriate X11 DISPLAY environment variable to run X11-dependent programs, as Leopard takes care of this requirement on its own.

Lastly, you need to synchronize your installation with the MacPorts rsync server:

Upon completion MacPorts will be ready to install ports!

It is recommended to run the above command on a regular basis to keep your installation current. Type “man port” at the command line prompt and/or browse over to our Guide to find out more information about using MacPorts. Help is also available.

Git Sources

If you are developer or a user with a taste for the bleeding edge and wish for the latest changes and feature additions, you may acquire the MacPorts sources through git. See the Guide section on installing from git.

Purpose-specific branches are also available at the https://github.com/macports/macports-base/branches url.

Alternatively, if you'd simply like to view the git repository without checking it out, you can do so via the GitHub web interface.

Selfupdate

If you already have MacPorts installed and have no restrictions to use the rsync networking protocol (tcp port 873 by default), the easiest way to upgrade to our latest available release, 2.6.4, is by using the selfupdate target of the port(1) command. This will both update your ports tree (by performing a sync operation) and rebuild your current installation if it's outdated, preserving your customizations, if any.

Other Platforms

Running on platforms other than macOS is not the main focus of The MacPorts Project, so remaining cross-platform is not an actively-pursued development goal. Nevertheless, it is not an actively-discouraged goal either and as a result some experimental support does exist for other POSIX-compliant platforms such as *BSD and GNU/Linux.

The full list of requirements to run MacPorts on these other platforms is as follows (we assume you have the basics such as GCC and X11):

Tcl (8.4 or 8.5), with threads.
mtree for directory hierarchy.
rsync for syncing the ports.
cURL for downloading distfiles.
SQLite for the port registry.
GNUstep (Base), for Foundation (optional, can be disabled via configure args).
OpenSSL for signature verification, and optionally for checksums. libmd may be used instead for checksums.

Normally you must install from source or from an git checkout to run MacPorts on any of these platforms.

Help