I need some help with file uploading and deleting

when I upload a file it seems to hang, and will only upload if I refresh my browser. same goes for deleting files and moving files.

I am using Safari, on my MacBook Air

and using octoprint version 1.5.3

also, the uploads folder I chmodded it to make it read and write and it always reverts to read only.

how can I permanently make it read and write?