Installation instructions for Mac OS name incorrect location for 10.13.x installs

[czamp]

Are you using Pressure2 or Pressure2 Dark?

Pressure2

Description of the issue.

Installing Pressure2 to Applications/Steam.app/Contents/MacOS/skins does not cause the Pressure2 skin to appear in the Interface > Skin Selection menu in Steam.

Does it also occur on Steam without the skin installed?

N/A

Are you in the Steam BETA? If so, does the issue occur when opted out of the BETA?

Issue occurred whether Beta was opted in, or opted out.

What Operating System are you using? (Windows 10, Mac OSX 11.1, Linux, Ubuntu etc.)

Mac OS 10.13.1

Are you using the latest stable release or using the latest commit version?

1.0.4 stable

Steps to reproduce the issue.

1. Run Mac OS 10.13.x
2. Follow installation instructions

Proposed Fix

Update the Mac installation instructions to include the correct path for installing Steam skins when user is running the latest Mac OS

The correct installation path is:

~/Library/Application Support/Steam/Steam.AppBundle/Steam/Contents/MacOS/skins

[DirtDiglett]

Looks like it's a different install path depending on OS X version.

I've modified the readme.md on my 1.1 branch to include both versions, will come in with the 1.1 release and will modify the website as well.