While working on my portfolio I got frustrated with the existing options for mocking up my work on a Macbook. Mockups were often in odd sizes & png format, making resizing undesirable due to loss of resolution. The thought I kept having was: "this is way more of a time sink than it has any right to be."

After more fruitless searching I hit the milestone all designers know well: where you decide to just build your own. The time already invested in looking around gave me a good starting point for what I liked and didn't like about other mockup resources. With a bit of extra experimentation and polish I had a fresh creation to try out for my portfolio case studies.