Use mac os tmp folders for updates.

[antoniovazquezblanco]

I think mac os temporary folder should be used for updating instead of the one in the Library folder.

I don't know if any of this folders should be erased by ourselves or if they are automatically cleaned.

[Timo6]

I'm not sure what the convention is for subdirectories in /tmp, so this just uses /tmp/VDrift. Files are apparently deleted on shutdown or every 3 days after last access otherwise.

[Timo6]

This causes issues if two users use VDrift before /tmp is clean - the folder is only writeable by one user. A solution would be to have a unique name for each run of VDrift. I'll look into it soon.

[antoniovazquezblanco]

What about writing directly to /tmp with temporal filenames randomly generated?

[Timo6]

That would work too. I don't know how to do either though.