Hi, folks. I´m new to Mac and from Norway so please be gentle. I recently bought a used Macbook Pro 13" online and as the title indicates, all is not well with it. It´s an early 2011 model with i5 core and Intel graphics. The main problem with it is the random kernel panics that occurs, mostly when I have many programs open, but also when it´s idle. Depending on the workload, they occur at least twice a day. I´ve done a lot of research online these past few days and have performed various tests (AHT, memtest) to determine if it´s a RAM issue. The previous owner had the memory upgraded from 4 to 8 GB, but the standard set had a bus of 1333 MHz (according to Apple serial number info) while the upgraded ones only has 1067 MHz. Could this be the problem or could the RAM just be faulty? Or is it something else? While the AHT came out empty, the memtest showed promise when my screen got covered with green and red dots and a deep beeping sound. (If needed I can supply screenshots) I had to manually shut down in order to get it working again. Apart from the slight discomfort of kernel panics, the Mac works like a charm and I´m very happy with it. Helpful insight would be much appreciated.