Sets style of the button for MacOS X to other MacOS styles. Note the style on Windows and Linux will remain fixed since those systems don't have as many native button styles.
This property no longer works as it used to due to how macOS has changed, the meaning has changed as follows
0 - Small Bevel. -> Maps now to rectangular bevel button
1 - Medium Bevel -> Maps now to rectangular bevel button
2 - Large Bevel -> Maps now to round bevel button
3 - Rounded Bevel -> Maps now to round bevel button
4 - Round Button -> Maps now to round bevel button
5 - Large Round Button -> Maps now to round bevel button
6 - Push Button -> Maps now to round bevel button
7 - Mini Push Button -> Maps now to round bevel button
8 - Small Push Button -> Maps now to round bevel button
9 - Normal Push Button -> Maps now to round bevel button