Chapter 1 playground not rendering

Hi,
I am running my code in Version 10.2.1 (10E1001). I believe I’ve copied it all down correctly, but nothing is showing up when the playground runs. I’ve restarted xcode and it still doesn’t work.

Moreover, when I run the code that comes with the book, it also doesn’t work. Not sure how to dig into this, or if it is a known problem?

Thank you for any pointers.

@supercatilac - Hi, and welcome to the forums!

I’m not sure what to tell you, as the code does work for me on both Nvidia and AMD GPUs and in both Xcode 11 and 10.2.

Do you get any errors?

Have you tried restarting your computer? Sometimes playgrounds can be a bit touchy and need restarts, although usually restarting just Xcode is sufficient.

What are the specs for your computer?

Have you used playgrounds before? You know to press the play button and split the screen?