What am I doing wrong

[jrs1rules]

Im using this as a guide https://chromeunboxed.com/i-installed-macos-on-a-chromebook/

[walker84837]

So, looking at the guide you linked, I can tell - from the screenshot you posted here - that you have written some commands wrong, which might be because the guide made some mistakes in writing commands. The steps (and right commands) you should use are the following:
(I added sh so it actually runs, since it's not set as an executable, it will look in your /usr/bin for the basic.sh file, which isn't there, but it's instead in your macOS-Simple-KVM folder in your ~)

• sh ./jumpstart.sh
• sh ./basic.sh
• qemu-img create -f qcow2 MyDisk.qcow2 64G: "MyDisk" can be whatever, but remember changing the name in the below step:
  First you edit the basic.sh file by using nano (nano basic.sh), as the guide showed (which is installed by using sudo apt install nano), then at the end of the file you add the following:

-drive id=SystemDisk,if=none,file=MyDisk.qcow2 \
-device ide-hd,bus=sata.4,drive=SystemDisk \

I recommending indenting; then, after adding the above snippet to the end of your basic.sh, on your keyboard, you do CTRL+O to save the file and after that do CTRL+X to close the file.
And, finally, you run sh ./basic.sh, and it should run as expected.