Log4j configuration: collect logs in more than 1 file

Hello,

How to configure log4j in application_server/servoy.properties file to collect logs in more than 1 file?
Even if i have another new appender near the defaults, it does collect all the logs BUT sends them to 1 file?
This is the default log4j configuration:

log4j.appender.configservlet=com.servoy.j2db.util.SlidingWindowAppender
log4j.appender.configservlet.layout=com.servoy.j2db.util.Log4JHTMLTableLayout
log4j.appender.configservlet.layout.dateTimeFormat=yyyy-MM-dd HH\:mm
log4j.appender.configservlet.windowSize=1000
log4j.appender.file=org.apache.log4j.RollingFileAppender
log4j.appender.file.File=%%servoy_app_server_dir%%/servoy_log.txt
log4j.appender.file.MaxBackupIndex=1
log4j.appender.file.MaxFileSize=10MB
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d %p [%t] %c - %m%n
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d %p [%t] %c - %m%n
log4j.debug=false
log4j.logger.com.servoy.j2db.util.Debug=WARN
log4j.logger.org.apache.wicket=WARN
log4j.rootCategory=DEBUG, file, configservlet

And i have another file based log4j.appender.myappender… configured with:

.
log4j.appender.file.File=%%servoy_app_server_dir%%/mylogs.txt
.
.

I tried to tweak:
log4j.rootCategory=DEBUG, file, configservlet, myappender

But always goes only to servoy_log.txt OR mylogs.txt; Never both? Why?

How to generate logs in more than 1 file?

Regards

Platform that i use is Mac
And this issue seems to be only related to Mac
On Win7 both log files are generated: mylogs.log and servoy_log.txt (with same contents in this case)

Btw, path separator for Win is \ and Mac /
Example: log4j.appender.file.File=%%servoy_app_server_dir%%\servoy_log.txt

This snippet from servoy.properties creates 2 files with same contents:
<servoy_install>/developer/mylogs.txt
<servoy_install>/application_server/servoy_log.txt

log4j.appender.A1=org.apache.log4j.RollingFileAppender
log4j.appender.A1.Append=true
log4j.appender.A1.DatePattern='.'yyy-MM-dd
log4j.appender.A1.File=mylogs.log
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=%d{yyyy-MM-dd HH\:mm\:ss} %c{1} [%p] %m%n
log4j.appender.configservlet=com.servoy.j2db.util.SlidingWindowAppender
log4j.appender.configservlet.layout=com.servoy.j2db.util.Log4JHTMLTableLayout
log4j.appender.configservlet.layout.dateTimeFormat=yyyy-MM-dd HH\:mm
log4j.appender.configservlet.windowSize=1000
log4j.appender.file=org.apache.log4j.RollingFileAppender
log4j.appender.file.File=%%servoy_app_server_dir%%\\servoy_log.txt
log4j.appender.file.MaxBackupIndex=1
log4j.appender.file.MaxFileSize=10MB
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d %p [%t] %c - %m%n
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d %p [%t] %c - %m%n
log4j.debug=false
log4j.logger.com.servoy.j2db.util.Debug=WARN
log4j.logger.org.apache.wicket=WARN
log4j.rootCategory=INFO, file, A1

Looking forward for Mac users answers -hints, guidelines!

Regards