Any chance there's a direct download link available for the latest beta 8 of OSX?
Direct Download Link
In addition to the links in the thread linked to above, which will update you from Beta 7 to Beta 8, the full Beta 8 installer can be downloaded from https://developer.apple.com/osx/download/. Clicking on the download link there will give you a new code that you can redeem to download the full installer from the App Store.
If you're going with the deltas in the links that dialabrain linked you to already then don't forget to run the FirmwareUpdate.pkg first.
-Max.
https://developer.apple.com/download/. some friendly advice--be sure to understand that this is a binding legal agreement and not share the file contrary to the terms of the agreement. to do so would put in jeopardy not only your continued participation in the program, but IMHO, such @sharing@ because a prime entry point for bad code, infections, etc and other nastiness of the etherworld.