Exporting numbers with MachinePrecision to csv very slow

Question

Using Mathematica 9.0.1.0 on Mac OS X 10.9.5 (that's the copy we have and the machine we have to use. Updating not possible.)

Exporting a number (for instance, 160.43) that I enter in manually, to a .csv is no problem:

Export["/Users/main/Downloads/test.csv", 160.43, "csv"]

However, whenever I export a the output of some other function, list, array, matrix, etc., the number is always given in $MachinePrecision and tries to execute this:

Export["/Users/main/Downloads/test.csv", 160.43`, "csv"]

it never completes. Even a single number can't be exported this way. I can't Abort or Interrupt it; I have to quit the kernel and restart the kernel.

The only difference in the number being exported is the ` which I can't suppress or bypass. I've tried N[], Round[], SetPrecision[], SetAccuracy[], Chop[], and several others.

What can I do to make it so that I only export the number 160.43 and not 160.43` ?