Pixelmator 3.4.1 has just been released through the Mac App Store and includes some significant performance improvements for Mac computers from 2011 that have Intel HD Graphics 3000 graphics cards.
Pixelmator should now be faster and more responsive than with the previous version on these particular Mac computers. This update has the best solution that we could find so far, although the underlying graphics driver issues haven't been fixed yet. Because of that, you may sometimes get crashes when working on or saving images with more than a few layers, especially text or shape layers.
If you have any crashes or performance issues when editing images with Pixelmator, we'd love to help you out. To get help as quickly as possible, it would be great if you could send the files you're having trouble with to email@example.com along with a short description of what's happening. A quick guide on uploading files and emailing them to us can be found at the link below:
Finally, for those of you who have emailed us about this already, we'll make sure to let you know about a full fix the moment we hear about it ourselves. We'd also like to say a big thank you for your patience and all your help with this.