Since installing the latest update I am getting the "rainbow" ball on my MacBook Pro (with 8GB Ram 2.67 GHz Intel Core i7) which has always been enough computing power. For this test I had nothing else running. I can simply try and scroll in an open Bible (or any window) and it brings the "rainbow" ball. Not sure what is causing this. I tried to do logs and I have a screen shot of what is open (which is a decent bit in Logos).
file:///Users/macbookpro/Desktop/LogosLogs.macbookpro.20150217-093202.zip (sample)
file:///Users/macbookpro/Desktop/LogosLogs.macbookpro.20150217-092448.zip
Let me know if things posted properly. 