qt53: disable non-building newer systems

fix one errant bracket in maintainer spec
for now do not disable 32bit builds until confirmed that these can't be fixed

aqua/qt53/Portfile

@@ -6,7 +6,7 @@ name                qt53
 
 categories          aqua
 platforms           macosx
-maintainers         {mcalhoun @MarcusCalhoun-Lopez} (kencu @kencu} openmaintainer
+maintainers         {mcalhoun @MarcusCalhoun-Lopez} {kencu @kencu} openmaintainer
 
 # for OpenSSLException, see source and header files in src/network/ssl of qtbase
 license             {LGPL-2.1 LGPL-3 GPL-3 OpenSSLException}
@@ -554,15 +554,13 @@ if { ${os.major} < 10 } {
     }
 }
 
-# this block has been disabled so the distfiles will be mirrored. Once they are mirrored, it can be enabled again
-# Qt 5.3 has not been built or tested on 10.7 or greater at present on MacPorts
-# if { ${os.major} > 10 } {
-#    pre-fetch {
-#        ui_error "${subport} has not been tested on OS X 10.7 or later"
-#        ui_error "You likely would prefer to use the default qt5 version for your system."
-#        return -code error "incompatible OS version"
-#    }
-#}
+if { ${os.major} > 13 } {
+    pre-fetch {
+        ui_error "${subport} does not build on OS X 10.10 or later"
+        ui_error "You would likely prefer to use the default qt5 version for your system."
+        return -code error "incompatible OS version"
+    }
+}
 
 foreach {module module_info} [array get modules] {