Ahhhh, hello my fellow knights.

Ever since I got a new I-Mac (OS X Yosemite) and installed Steam, I have been unable to play SK.
According to Spiral Knights' application, it seems that my issue pertains to my computer not having installed Java Runtime Environment software even though I have received verification for having done so (jre-8u45-macosx-x64.dmg).

Here is a screenshot showing the client complaining.

If it helps, my computer's specs are as follows:
OS X Yosemite- Version 10.10.3
Processor- 2.7 GHz Intel Core i5
Memory- 16 GB 1600 MHz DDR3
Graphics- Intel Iris Pro 1536 MB