PowerShell Core is a free download. Alacritty is a terminal app that gets a boost from your Mac’s GPU for better performance. It isn’t overloaded with features, but doesn’t cut.
Most of the time, you can re-download the current version of macOS via the Mac App Store, and older ones via these links:
However, I’ve run into a situation several times where the Software Update mechanism simply refuses to initiate a download:
Thankfully, macOS installers can be downloaded via Terminal in macOS Catalina. This command will download the most recent version of macOS, depositing it in your Applications folder:
softwareupdate --fetch-full-installer
The softwareupdate command has some neat tricks up its sleeve, as pointed out by Armin Briegel:
The --fetch-full-installer flag has a sub-flag: --full-installer-version which allows you to download a specific version.
During my testing in the Catalina beta version I was able to download 10.15, 10.14.6, 10.14.5, and 10.13.6. I was not able to test if 10.13.6 would download the hardware specific build of 10.13.6 for the 2018 MacBook Pro, since I do not have that hardware.
So, to pull 10.13.6 down, you’d use:
Mac Terminal App Download App
softwareupdate --fetch-full-installer --full-installer-version 10.13.6
I wish Apple would just have a support document up with direct downloads for all of this stuff, but this tool is not a bad alternative.
Update: Don’t miss this documentation from JAMF for more on the subject.
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Downloading Nmap
Nmap and Zenmap (the graphical front end) are available inseveral versions and formats. Recent source releases and binarypackages are described below. Older version (and sometimes newer testreleases) are available from the dist directory(and really old ones are in dist-old).For the moresecurity-paranoid (smart) users, GPG detached signatures and SHA-1hashes for each release are available in the sigsdirectory (verification instructions). Before downloading, be sure to read the relevant sections for your platform from the Nmap Install Guide. The mostimportant changes (features, bugfixes, etc) in each Nmap version aredescribed in the Changelog. Using Nmap is covered in the Reference Guide, and don't forget to readthe other available documentation, particularly the new book Nmap Network Scanning!
Nmap users are encouraged to subscribe to the Nmap-hackersmailing list. It is a low volume (7 posts in 2015), moderated listfor the most important announcements about Nmap, Insecure.org, andrelated projects. You can join the 128,953 current subscribers (as ofSeptember 2017) by submitting your email address here:
You can also get updates from our Facebook and Twitter pages.
Nmap is distributed with source code under custom license terms similar to (and derived from) the GNUGeneral Public License, as noted in the copyright page.
Microsoft Windows binaries
Please readthe Windows section of theInstall Guide for limitations and installation instructions for theWindows version of Nmap. You can choosefrom a self-installer (includes dependencies and also the Zenmap GUI)or the much smaller command-line zip file version. We support Nmap on Windows 7 and newer, as well as Windows Server 2008 and newer. We also maintain a guide for userswho must run Nmap on earlier Windows releases..
The Nmap executable Windows installer can handle Npcapinstallation, registry performance tweaks, and decompressing theexecutables and data files into your preferred location. It also includes the Zenmap graphical frontend. Skip all thecomplexity of the Windows zip files with a self-installer:
Latest stable release self-installer: nmap-7.91-setup.exe
We have written post-install usageinstructions. Please notify usif you encounter any problems or have suggestions for theinstaller.
For those who prefer the command-line zip files (Installation Instructions; UsageInstructions), they are still available. The Zenmap graphicalinterface is not included with these, so you need to runnmap.exe from a DOS/command window. Oryou can download and install a superior command shell such as thoseincluded with the free Cygwin system.Also, you need to run the Npcapand Microsoft Visual C++ 2013 Redistributable Packageinstallers which are included in the zip file. The main advantage is that these zip files are a fraction of the size of the executable installer:
Latest stable command-line zipfile:nmap-7.91-win32.zip
Linux RPM Source and Binaries
Many popular Linux distributions (Redhat, Mandrake, Suse, etc) usethe RPM package management system forquick and easy binary package installation. We havewritten a detailed guide toinstalling our RPM packages, though these simple commands usually dothe trick:You can also download and install the RPMs yourself:
Latest stable release:
x86-64 (64-bit Linux)Nmap RPM: nmap-7.91-1.x86_64.rpm
x86-64 (64-bit Linux)Ncat RPM: ncat-7.91-1.x86_64.rpm
x86-64 (64-bit Linux)Nping RPM: nping-0.7.91-1.x86_64.rpm
Optional Zenmap GUI (all platforms): zenmap-7.91-1.noarch.rpm
Source RPM (includes Nmap, Zenmap, Ncat, and Nping): nmap-7.91-1.src.rpm
Mac OS X Binaries
Nmap binaries for Mac OS X (Intel x86) are distributed as a disk image filecontaining an installer. The installer allows installing Nmap, Zenmap,Ncat, and Ndiff. The programs have been tested on Intel computersrunning Mac OS X 10.8 and later. See theMac OS X Nmap installpage for more details. Users of PowerPC (PPC) Mac machines, which Apple ceased selling in 2006, should see this page instead for support information.
Latest stable release installer: nmap-7.91.dmg
Source Code Distribution
This is the traditional compile-it-yourself format. The Nmaptarball compiles under Linux, Mac OS X, Windows, and many UNIXplatforms (Solaris, Free/Net/OpenBSD, etc.) It includes Zenmap, theGUI frontend.
Detailed Linux/BSD/Solaris compilation instructions and options are provided here, though this usually does the trick:
Most Windows users install with our Windows executable installer, but we also provide Windows source code compilation instructions.
Most Mac OS X users install with our Mac installer, but we also provide Mac OS X source code compilation instructions.
Terminal App For Mac
If you are compiling Nmap anyway, you might prefer to get the very latest code from our SVN source code repository rather than downloading a tarball here.
Latest stable Nmap release tarball: nmap-7.91.tar.bz2 (or gzip compressed)
Other Operating Systems
Many other operating systems support Nmap so well that I have no needto create and distribute binary packages myself. You can choose touse the packages below, or compile the sourcedistribution, which is often newer. We have created installation pages for the following platforms:
Linux (all distributions)
Microsoft Windows
Mac OS X
FreeBSD, OpenBSD, and NetBSD
Sun Solaris
Amiga, HP-UX, and Other Platforms
Nmap Site Navigation
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