I have the same laptop. It was the first Retina model Apple released in 2012 and it held up great for a long time. Last year, it started to have random kernel panics. Seems that was a factory defect and Apple used to fix it for free, but now it's "vintage" so they won't do it anymore. I can't believe it has a HDMI port and a SD card slot. Don't think those are ever coming back to Macbooks.