Apple’s Mac sales have seen better days, and as the company prepares to launch the first models with an OLED screen, its suppliers are reportedly getting nervous over the transition. It appears that their anticipation of profit generation was overestimated, as two suppliers have not made key investments, likely believing that they will not be able to make any money off of this venture. Building a Gen 8 OLED production line can take around a year to complete, and Korean suppliers are hesitant to make a move Earlier statistics revealed that Apple’s Mac business suffered a 40 percent shipments decline…