I'm new to blender, and I'm working on a project where I'm making a character. I already UV mapped it and added texture, etc. But, once I tried texture painting, the paintbrush kept freezing, and the cursor wouldn't unfreeze. I'm currently in Blender Render mode, and I have a Mac. I have version 2.77. Please let me know what I'm doing wrong, and how I can fix this. Thanks!