About high sierra problems, i forgot to mention my Mac configuration. so here it is, i hope this will helpCan't wait to try the new release. MacBook Pro (Retina, 15-inch, Late 2013)Processor : 2.3 GHz Intel Core i7Memmory : RAM 16 GB 1600 MHz DDR3 (SSD)HD 500 GB (SSD)Grapichs: NVIDIA GeForce GT 750M 2048 MBIntel Iris Pro 1536 MBMacOS High Sierra Version 10.13.4 Thank you