[R-SIG-Mac] CairoPNG() produces empty file on Snow Leopard

[Dan Tenenbaum]

Hi,

library(Cairo)
CairoPNG("foo.png")
plot(1:10)
dev.off()

Creates an empty foo.png file. But it works on Mavericks, Linux, and Windows.

> sessionInfo()
R version 3.2.1 (2015-06-18)
Platform: x86_64-apple-darwin10.8.0 (64-bit)
Running under: OS X 10.6.8 (Snow Leopard)

locale:
[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] Cairo_1.5-6

loaded via a namespace (and not attached):
[1] tools_3.2.1

Thanks,
Dan