Plotting with feh in macOS failes with --magick-timeout,

so replace it by --conversion-timeout, which does not do
in Linux or Cygwin.

examples/svg/nmos_out_BSIM330_png.sp

@@ -34,13 +34,17 @@ set nolegend
 * only the gnuplot window, no gnuplot files
 gnuplot temp vss#branch vss2#branch title 'Drain current versus drain voltage' xlabel 'Drain voltage / V' ylabel 'Drain current / µA'
 
-
-* for MS Windows only
+* MS Windows
 if $oscompiled = 1 | $oscompiled = 8
   shell Start c:\"program files"\irfanview\i_view64.exe plot_1.png
 else
+  if $oscompiled = 7
+* macOS (using feh from homebrew)
+    shell feh --conversion-timeout 1  plot_1.png &
+  else
 * for CYGWIN, Linux
     shell feh --magick-timeout 1  plot_1.png &
+  end
 end
 .endc
 

examples/svg/nmos_out_BSIM330_svg-2.sp

@@ -51,9 +51,15 @@ if $oscompiled = 1 | $oscompiled = 8
   shell Start plot_10.svg
   shell Start plot_11.svg
 else
+  if $oscompiled = 7
+* macOS (using feh from homebrew)
+    shell feh --conversion-timeout 1  plot_10.svg &
+    shell feh --conversion-timeout 1  plot_11.svg &
+  else
 * for CYGWIN, Linux
     shell feh --magick-timeout 1  plot_10.svg &
     shell feh --magick-timeout 1  plot_11.svg &
+  end
 end
 .endc
 

examples/svg/nmos_out_BSIM330_svg.sp

@@ -81,6 +81,15 @@ if $oscompiled = 1 | $oscompiled = 8
   shell Start plot_4.svg
   shell Start plot_5.svg
 else
+  if $oscompiled = 7
+* macOS (using feh and ImageMagick from homebrew)
+    shell feh --conversion-timeout 1  plot_0.svg &
+    shell feh --conversion-timeout 1  plot_1.svg &
+    shell feh --conversion-timeout 1  plot_2.svg &
+    shell feh --conversion-timeout 1  plot_3.svg &
+    shell feh --conversion-timeout 1  plot_4.svg &
+    shell feh --conversion-timeout 1  plot_5.svg &
+  else
 * for CYGWIN, Linux
     shell feh --magick-timeout 1  plot_0.svg &
     shell feh --magick-timeout 1  plot_1.svg &
@@ -88,6 +97,7 @@ else
     shell feh --magick-timeout 1  plot_3.svg &
     shell feh --magick-timeout 1  plot_4.svg &
     shell feh --magick-timeout 1  plot_5.svg &
+  end
 end
 .endc
 

examples/svg/nmos_out_BSIM330_various.sp

@@ -66,10 +66,16 @@ hardcopy plot_5.svg vss#branch title 'Drain current versus drain voltage' xlabel
 if $oscompiled = 1 | $oscompiled = 8
   shell Start /B plot_4.svg
   shell Start /B plot_5.svg
-* for CYGWIN, Linux
 else
+  if $oscompiled = 7
+* macOS (using feh from homebrew)
+    shell feh --conversion-timeout 1  plot_4.svg &
+    shell feh --conversion-timeout 1  plot_5.svg &
+* for CYGWIN, Linux
+  else
     shell feh --magick-timeout 1  plot_4.svg &
     shell feh --magick-timeout 1  plot_5.svg &
+  end
 end
 .endc