You can download previous Fiji builds by date stamp from the archive. See the source code page for details on obtaining the Fiji source code. That means that you do not have to run an installer just download, unpack and Support for installing Fiji via Flatpak is in the works see Alternatively you can install the no-JRE version which defaults to the Mac Java and will limit some native library functionality that does not yet have Arm64 support ().
MacOS Arm64 Note: The default MacOS download should run on Arm64 via the Rosetta translator ((software)) which may come at some performance cost.However, Fiji (like ImageJ) should run on any system for which a Java 8 runtime is available (Solaris, Raspbian, etc.). Fiji is supported on the following systems:
