Need Macros to pull Data from one file into another - Several sheets involved - Mac

Hi again everyone!
**This is posted elsewhere but I only got a Macros suitable for Windows**

I have two files Daily_Stress and SampleTest. SampleTest has column J that needs to be filled in using B and E as a reference. The Macros should pull data from Daily_Stress. Column B matches with Column A in each sheet of Daily_Stress. Column E matches with one of four Sheets in Daily_Stress. R1=R1, R2=R2, and PB1=PB1. Column J of SampleTest will ultimately be filled in with the data from the correct cell in Column E from Daily_Stress.

BUT here is the kicker and the really confusing part. I cannot have 2/2/2015 on SampleTest matching with 2/2/2015 on Daily_Stress. Instead, I need the cell connected to 2/2/2015 on SampleTest to pull in data from 2/1/2015 on the correct Daily_Stress Sheet. I am trying to list the number of tourists the day BEFORE each sample was collected.

Does this make sense? I attached the files and the first half of column J is filled in already.

Whatever Macros is created, I need it to please run on a Mac.

Thank you in advance!