please help me the RC blinks slow green

[yugo]

after trying to update my rc over dji assistant on Mac it shows me that the current version was 1.4 and that 1.8 is available!
after downloading it it failed to update!
now its flashing the first power light slow green and makes no beep tone!
what can I do ?!

 

[GrammatonxXXxCleric]

Without knowing which model you have can't tell you what to do other than go here: DJI - The Future Of Possible and look for the PDF on how to update it.
If it's a Phantom 3 advanced then this page will get you the info: Phantom 3 Advanced - Specs, FAQ, Tutorials, Downloads and DJI GO - DJI