Astronomer's Proposal Tool

APT 2026.5 APT-92041 (Fri Jun 12 2026)

Available Installers


Apple Silicon	11 (Big Sur) +	macOS Apple Silicon Download	macOS Apple Silicon Instructions
Intel	10.12 (Sierra) +	macOS Intel Download	macOS Intel Instructions
	RHEL 7 +, Ubuntu 18.04 +	Linux Download	Linux Instructions
	Windows 8.1 +	Windows Installer Windows Zip	Windows Instructions

macOS Apple Silicon Instructions:

Instructions

After downloading, double-click APT_ARM.pkg to start the installation.

Notes

More details on supported Mac systems and installation troubleshooting.

SHA-256: baadf5ed6a73c670f361ba7b2351d74c068dad3a443a553e18a493efa2ec82c9

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macOS Intel Instructions:

Instructions

After downloading, double-click APT_Intel.pkg to start the installation.

Notes

More details on supported Mac systems and installation troubleshooting.

SHA-256: 58c3460c0bf2be3f1e751ce7e98cd420411296e73dcdbd8875ad1e8c445b2978

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Linux Instructions:

Instructions

Download the zip file, open a console window, and run the command unzip APT.linux.zip. This will unpack the application directory named by the APT version, like APT 2026.3.2
mv the APT directory to where you would like APT to be installed.
You can start APT from inside the installation directory: ./APT

Notes

More details on supported Linux systems and installation troubleshooting.

SHA-256: ee34343da9964710fded69c12870348e2708ea559f47f37e41d059f8a40345af

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Windows Instructions:

Instructions

Download MSI Installer, and double-click on the APT.msi file to start the installer.
(Note that you may get one or more warning pop up messages that ask you: "Are you sure you want to launch “APT.msi”?", tell you that "Windows protected your PC", or tell you a suspicious file was detected and does a scan.)

Important notes about choosing an installation directory

By default APT will be installed in the hidden subfolder \AppData\Local of the user's home folder. But you can choose another location.
In situations where APT must be installed into a common area (such as C:\Program Files), you may need to use an actual Administrator account and not an account that has Administrator privileges or some institution specific configuration of heightened privileges. If you choose to install to this location, please be sure to specify a folder within Program Files e.g. C:\Program Files\APT_2026.3.2.

More details on supported Windows systems and installation troubleshooting.

MSI SHA-256: 75bd913027071fc774909887c3c552c9a90e2c8a8acc7dcc37d8b4a20c111f70

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Changeset: d0df43bc1e6e1e74359dc9d7fe0bdfdb0195de2c. Build time: 12-Jun-2026 12:13 PM. Built by: sstadmin on runner-z3xjyq3t-project-456-concurrent-0-8kkiccsh. JWST PRD version PRDAPTSOC-073-003. Roman PRD version PRDDEVRSOC-003