Sorry, upper version for your MBP is 0.12.4.
Feature request: https://bugs.launchpad.net/stellarium/+bug/1372781
You can try set environment variable QT_DEVICE_PIXEL_RATIO=2 as workaround.
beta 0.13.3 is not exists
Are you meant 0.13.1?
Can you download version 0.13.2 and check it again?
Can you check it on release?
Are you know that Stellarium used local time?