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To get the latest features and maintain the security, stability, compatibility, and performance of your Mac, it's important to keep your software up to date. Apple recommends that you always use the latest macOS that is compatible with your Mac.

Learn how to upgrade to macOS Big Sur, the latest version of macOS.

Check compatibility

The version of macOS that came with your Mac is the earliest version it can use. For example, if your Mac came with macOS Big Sur, it will not accept installation of macOS Catalina or earlier.

If a macOS can't be used on your Mac, the App Store or installer will let you know. For example, it might say that it's not compatible with this device or is too old to be opened on this version of macOS. To confirm compatibility before downloading, check the minimum hardware requirements:

This article explains how to quickly set up MongoDB on macOS Catalina. Install homebrew The Missing Package Manager for macOS!; brew install wget. Install MongoDB community version.

If you have a machine with one of these GPUs installed, I'd advise upgrading it if possible (can be done in 2010/2011 iMacs, iMac11,x-12,x), disabling the dedicated GPU if using a 2011 15' or 17' MacBook Pro (MacBookPro8,2/8,3, instructions to do so can be found here), or not installing Catalina. Running Catalina without full graphics.
Instead, it is an app called Install macOS Catalina, which is used to make the upgrade from current macOS to Catalina. For a clean install, it is better to download the dmg file and make an installer USB. Note: Make sure to back up your Mac prior to installing macOS Catalina. Step 1: Go to Mac App Store and search macOS Catalina.

macOS Catalina 10.15 hardware requirements
macOS Mojave 10.14 hardware requirements
macOS High Sierra 10.13 hardware requirements
macOS Sierra 10.12 hardware requirements
OS X El Capitan 10.11 hardware requirements
OS X Yosemite 10.10 hardware requirements

Download macOS using Safari on your Mac

Safari uses these links to find the old installers in the App Store. After downloading from the App Store, the installer opens automatically.

macOS Catalina 10.15 can upgrade Mojave, High Sierra, Sierra, El Capitan, Yosemite, Mavericks
macOS Mojave 10.14 can upgrade High Sierra, Sierra, El Capitan, Yosemite, Mavericks, Mountain Lion
macOS High Sierra 10.13 can upgrade Sierra, El Capitan, Yosemite, Mavericks, Mountain Lion

Safari downloads the following older installers as a disk image named InstallOS.dmg or InstallMacOSX.dmg. Open the disk image, then open the .pkg installer inside the disk image. It installs an app named Install [Version Name]. Open that app from your Applications folder to begin installing the operating system.

macOS Sierra 10.12 can upgrade El Capitan, Yosemite, Mavericks, Mountain Lion, or Lion
OS X El Capitan 10.11 can upgrade Yosemite, Mavericks, Mountain Lion, Lion, or Snow Leopard
OS X Yosemite 10.10can upgrade Mavericks, Mountain Lion, Lion, or Snow Leopard

Third-Party Libraries

Jump to a library :

These instructions describe building and installing IBAMR and its requiredthird-party libraries on a macOS system. The instructions below create both adebug build, where the libraries are compiled with additional checking and canbe used with a debugger, and an optimized build, which is generally severaltimes faster than the debug build because most error checking is turned offand debugging information is not available.

All libraries specified below are compiled with the make program. We recommendrunning make in parallel whenever possible: make is smart enough to compilemultiple files at once. One can specify the number of jobs, or concurrent copiesof make to run, with the -j flag: i.e., running make -j4 will compile fourfiles at once. We recommend using the same number of make jobs as physicalprocessors on a machine. The sample instructions here use four jobs.

The package manager HomeBrew is used here to install severalpackages IBAMR depends on. After installing HomeBrew, install necessarypackages:

At the present time IBAMR is not compatible with the version of hypre installedthrough homebrew, so hypre (and PETSc) must be installed manually. You may alsoinstall these optional packages:

Note: You do not need to build your own versions of Boost, HDF5, orMPICH. All of these packages are now installed, by default, in /usr/local.

It will be useful to install the wget command through HomeBrew:

Picking good optimization flags

IBAMR’s performance in release mode is very sensitive to the choice ofoptimization flags. For example: switching from -O3 to -march=native -O3roughly doubled the performance of some IBFE-based codes. This is because alarge fraction of the time spent in IBAMR is spent doing structured gridcalculations that can benefit heavily from applying processor-specificoptimizations.

If you want good performance then we recommend adding -march=native to theflags chosen below for optimization purposes (i.e., any place where we write-O3, we recommend you use -O3 -march=native). This is not listed as thedefault compiler flag because it generates processor-specific instructions, whichmay not be valid if you compile on one machine and execute on another (e.g., ifyou compile on a cluster’s login node and then run on a partition that uses adifferent set of hardware). For the most part this is not relevant on a mac(since these are not usually networked) unless you are doing something unusual.

Most of the time spent by IBAMR applications is spent inside IBAMR functions, somost of the benefit of processor-specific compilation flags is achieved bycompiling IBAMR itself (i.e., it is not necessary to recompile dependencies with-march=native, but it can only help).

For more information see The GCC page on compilerflags. The flag-march=native is supported on all major C++ compilers (GCC, Clang, and Intel).

Setup

Boost

Currently, IBAMR requires Boost version greater than or equal to 1.57.

This is available in /usr/local through HomeBrew.

Eigen

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Currently, IBAMR requires Eigen version greater than or equal to 3.2.5.

NOTE: Eigen 3.2.5 is bundled with IBAMR and is built automatically by IBAMRconfigure. It is also possible to use an external installation of Eigen withIBAMR. If you will be using libMesh, you must use an external Eigen.

HDF5

any version of HDF5 >= 1.8.7 is likely to work with IBAMR.

This is available in /usr/local through HomeBrew.

Silo

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(optional)

We recommend using the latest available version of Silo (currently 4.10), butearlier versions of Silo are also likely to work with IBAMR. We recommendletting PETSc download Silo (via --download-silo=1). If you let PETSc buildSilo then all paths supplied later on to indicate where Silo is must point toPETSc’s installation directory.

NOTE: Silo 4.10 requires an installation of zlib that includes its headersand development files: make sure that your installation includes zlib.h. Ifyou build it from source from http://zlib.net/, specify itslocation with:

--with-zlib='path/to/zlib/1.2.8/include,path/to/zlib/1.2.8/lib' .

Notice that you have to specify its include and lib directories.

If you do not have the GNU readline library installed, you may need--without-readline.

muParser

NOTE: A patched version of muParser 2.2.3 is bundled with IBAMR and installedautomatically by IBAMR configure. It is also possible to use an externalinstallation of muParser with IBAMR.

MPI

IBAMR requires that MP