Jupyter Notebook中无法识别Julia内核的问题求助

Hey there, I’ve run into this exact issue on my M1 Mac before—those little architecture-related quirks can be tricky! Let’s walk through some fixes that worked for me:

1. Manually Register the Julia Kernel #

Sometimes the automatic kernel registration during Pkg.add("IJulia") fails silently, especially on ARM-based systems. Let’s force it to create the config Jupyter needs:

• Open your Julia REPL, run these commands:

  using IJulia
  IJulia.installkernel("Julia")
  

2. Verify Jupyter’s Recognized Kernels #

Check if Julia’s kernel is actually in Jupyter’s kernel list:

• Open a terminal (make sure it matches your Julia’s architecture) and run:

  jupyter kernelspec list
  

  You should see an entry like julia-1.7 with a file path. If it’s missing, the manual install step above should add it.

3. Match Architecture Between Julia and Jupyter #

M1 Macs run in two modes (ARM native vs. Rosetta emulation), and mismatches here often cause kernels to go missing:

• Check Julia’s architecture: In the Julia REPL, run Sys.ARCH—it should return :aarch64 for native ARM.
• Check your terminal/Jupyter’s architecture: Open your terminal, go to Terminal > Settings > Profiles > [Your Profile] > Advanced—make sure "Open using Rosetta" is unchecked if you’re using native Julia. If Jupyter was installed via a Rosetta-emulated Python, consider installing a native ARM Python (e.g., via Homebrew) and reinstalling Jupyter there.

4. Clean Reinstall IJulia (Last Resort) #

If the above steps don’t work, try a fresh install:

• In Julia REPL:

  Pkg.rm("IJulia")
  Pkg.add("IJulia")
  using IJulia
  IJulia.installkernel("Julia")
  

After trying these steps, restart Jupyter Notebook and check the "New" menu again—your Julia kernel should show up!

内容的提问来源于stack exchange，提问作者seeker_after_truth