^{So I just went through the laboring task of getting SAI on my macbook pro.  it took quite a while, but now it works! Since is was so flippin difficult, I though I would share with you how I did it.}

◘ 1. Get Parallels (i used Parallels 6), a Windows OS (I used Windows 7), and Paint Tool SAI.  I'm not gonna give you download links or any of that.  If you don't where to get them, then buy them.

◘ 2. Run Windows 7 on Parallels. Since I'm retarded, and didn't know how to do this at first, I'll tell you.  First, you open Parallels (must be activated for this to work) and make a new virtual machine. Browse and find the windows OS you downloaded.  Install it so that it runs like a PC

◘ 3. Install Paint Tool SAI on the Windows virtual machine.  You pull up the .exe file in a finder window, right click and say "open with > windows explorer (windows 7)".  That should install the program.

◘ 4. Download the windows driver for your tablet.  Install it to the virtual machine the same way you installed SAI, by right clicking and opening with windows explorer.

◘ 5. Go to the devices tab in Parallels.  This can be found one of two ways, depending on how you set up your virtual machine. The first is in the very top toolbar of your mac, there should be a little parallels icon. You click that and select "Devices".  The other way is to click the "Show devices" next to the configure button on the bottom toolbar of the parallels window, while windows is running.

◘ 6. Under Devices, select "USB" and then select your tablet, which may show up as a weird letter-number combo (mine was PTK-650 or something).  It will ask you if you want to run this device in windows. Say yes or accept or whatever it is.

◘ 7. After, that, there might be a glitch in your windows screen/programs.  The mouse cursor might not move with the tablet pen.  To fix this for Windows 7 (might be different for older windows OS) you right click on the desktop of windows and go to "Personalize>Change Mouse Pointers>Pointer options" and make sure the checkbox for Pointer Trails is on.  This should fix the bug.

^{After that, my pressure sensitivity in SAI was working beautifully!  Hopefully this has helped someone out there who refuses to settle for anything other than the best painting program out there}