Not specifically for Mac, but I've used the free plan for this Chrome app and it works quite well: https://chrome.google.com/webstore/detail/lucidchart-diagrams

Not specifically for Mac, but I've used the free plan for this Chrome app and it works quite well: https://chrome.google.com/webstore/detail/lucidchart-diagrams-onlin/apboafhkiegglekeafbckfjldecefkhn?hl=en https://chrome.google.com/webstore/detail/lucidchart-diagram...