Version 1.8.8 client not working on Mavericks 10.9.5

I have had no issues with Minecraft for the past 18 months, and had upgraded successfully up to 1.8.6. When I tried to upgrade to 1.8.8 with the new launcher, it no longer works. The launcher downloads the latest minecraft runtime, then simply hangs with a white screen and has to be force quit.

Can you please make it possible to download the older 1.8.6 version? I can find no where safe to get it, and it's the last version I confirmed worked on Mavericks.

Thanks you very much.

• Jeff