From Flooxs
How to Downgrade macOS Big Sur to Catalina or Mojave. This will bring up the format options for the drive. Enter a preferred name for the drive and then choose the file system format as either “Apple File System (APFS)” (if you’re using a Mac with Solid State Drive) or “Mac OS Extended Journaled (HFS+)” (for Macs with mechanical and hybrid hard drives). Note: This same script works for Big Sur, Catalina, Mojave, and High Sierra. Late 2013) and install Xubuntu on it - as the OS X kernel kept crashing on it!
The preparation you need do:
1. Download the software and put it on your hard drive in a directory called flooxs.
2. Get the Developer Package for Mac and installed. XCode is free on the App Store. Once in xcode, enable the command line tools by going to preferences/locations and selecting the command line tools in the option list.
3. Make sure you have the X11 or terminal.
4. If possible get a good text editor, like smultron.
5. Download macports.
Installing & Compiling FLOOXS on Mac:
1. With macports, install: Plplot, Tcl-tk, Aquaterm, and Suitesparse by opening the terminal and using the command:
3. Go to the [Your Location]/flooxs directory and run:
4. To build flooxs, go to [Your Location]/flooxs/src and run :
5. You need a start up file to set up environments, this can be put in your shell's rc file. Below is an example of text in the start up file:
6. You can source the start up file from Step 5 and when you run the command flooxs, it should run FLOOXS. Below is how to run FLOOXS without the start up file.
How to run the simulation on the Mac:
1. Go to Application --> Utilities, open X11.
2. Make sure you are working at the csh, if it is bash, please type csh, it will directly change to the csh.
3. Find the floops software where you put it, if you put it at the desktop, please type the following,
4. Now you are at the floops directory, when you type cd, you will see NewExpr this file.
5. Then type the following commands,
After these steps, when you see the following commands, that means you successfully launching the flooxs.