Shep Overland

I recently have been experiencing some new problems: (1) Items--prims--I click on become transparent. What setting controls this? It has happened continually for the past 2 days. (2) There is a www line --where web addresses are supposed to be typed --that floats across my viewer. Nothing I do has any effect on it..It is impossible to remove. Thanks for helping.

Suitable for quality sl viewing? Mac mini with 2.6GHz dual-core Intel Core i5; 8GB memory; 1TB hard drive; Intel Iris Graphics; OSX Yosemite.

Please reply regarding projected performance of this computer on SL: Mac Mini 2.8GHz dual-core Intel core i5 8GB memory 1TB fusion drive Intel Iris Graphics OS X Yosemite Operating