R Freezes (Mac) using file.choose()

I'm using a mac with OSX Yosemite (10.10.2), running the latest version of 
R (3.1.3). But I've been having this same issue since Mavericks came out, 
using all of  the different versions of R that have come out since 
Mavericks. 

Often (approximately 15% of the time I would say), whenever I use a 
function in R that pulls up a mac finder window, R will freeze and I am 
left with the spinning beach ball until I force-quit R. This happens most 
frequently when using "file.choose()" to open a file, but has happened to 
me when changing the working directory through the "Misc" tab as well: 

Misc-> Change Working Directory 


This has happened on at least three different Mac machines of varying 
ages, so I don't think this is a computer specific issue. And as much of 
the scripts I have written use "file.choose()", this happens on a regular 
basis. 

Have other people run into this same issue? If so, is there a fix for it? 
                                                
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