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I've recently tried to use the Stable Diffusion web UI from AUTOMATIC1111 on my Mac Intel. There is no documentation for Mac Intel, and when I tried to use the methods presented for other platforms, I ended-up with a Python exception related to LZMA:

ModuleNotFoundError: No module named '_lzma'

I was able to fix the problem thanks to this stack overflow post. This allowed me to write an installation guide / documentation for Mac Intel that I share in my answer.

My configuration:

  • MacBook Pro 2019
  • CPU 2,6 GHz 6-Core Intel Core i7
  • GPU Intel UHD Graphics 630 1536 MB
  • Memory 32 GB 2667 MHz DDR4
  • System macOS Ventura 13.2.1
Vincent Garcia
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    Stack Overflow is not the right place to ask how to install software other than things that are _exclusively_ development tools. Even then, unless the problem is something that wouldn't happen when installing any other kind of software, it's often off-topic. – Charles Duffy Apr 08 '23 at 22:41
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    Thanks for sharing your opinion. The initial problem I had was a Python exception raised when using Stable Diffusion (which is relevant in Stack overflow). I was able to fix it thanks to a Stack overflow post. Sharing my solution, which is this installation guide, seemed to me to be the right thing to do: give back to the Stack overflow community. But if this solution is not welcome, I'll of course delete it. – Vincent Garcia Apr 09 '23 at 12:25
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    I've tried to improve the content of this page following your remark @CharlesDuffy. Hopefully the edited version will be more informative and more adequate to the Stack overflow guidelines. Thanks again for your contribution. – Vincent Garcia Apr 09 '23 at 12:51

2 Answers2

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Prerequisites:

  • Have brew installed
  • Have git installed
  • Have pyenv installed
  • Know how to use a Terminal

Installation guide:

  1. Open a Terminal and move to the directory where you want to install Stable Diffusion web UI.

  2. Using the Terminal, clone the stable-diffusion-webui repo. This will create a stable-diffusion-webui directory. Once the cloning is done, move into this directory:

$ git clone git@github.com:AUTOMATIC1111/stable-diffusion-webui.git
$ cd stable-diffusion-webui
  1. Using the Terminal, install xz with brew. Note that this needs to be done before installing Python 3.10:
$ brew install xz
  1. Using the Terminal, install Python 3.10 using pyenv. Then set the local Python version to 3.10 in the stable-diffusion-webui directory. This will only affect the Python version used within this directory, the default Python version will be unchanged:
$ pyenv install 3.10
$ pyenv local 3.10

  1. Download a Stable Diffusion model checkpoint. I downloaded the 1.5 version (v1-5-pruned.ckpt file) from the Hugging Face website. Then move the checkpoint into the models/Stable-diffusion directory.

  2. Using the Terminal, run the webui.sh script:

$ ./webui.sh

If everything went fine, you should have in the Terminal a message that looks like this:

Running on local URL: http://127.0.0.1:7860
  1. Open the URL in an Internet browser. In the txt2img tab, enter a prompt and click the generate button. This will start the image generation process.

The image I attached to this post was generated on my MacBook Pro Intel.

Image computed using Stable Diffusion web UI

Vincent Garcia
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Another way is to install Anaconda first, which takes care of the prerequisites.

spongebob
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  • Thanks for this suggestion. You're right, Anaconda is a good alternative. I've used it for years, but I now prefer to use pyenv + poetry when it comes to Python projects. This is a matter of preference I guess. Thanks again ^^ – Vincent Garcia Apr 09 '23 at 12:30