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[JimH]

We're seeing some problems, but so are others:
http://venturebeat.com/2013/10/25/apples-new-os-x-mavericks-crashes-far-more-frequently-for-some-including-me/

[mercman]

No crashes on 2 Macs. Your latest software has had no issues for me other than the question of integer support.

[freddie40]

Have been using Mavericks for almost 4 weeks and have had very few problems, no more than Mountain Lion.  Ignore the article.

Dave

[south]

As anyone done a benchmark before/after installing Maverick to see if there is a change in speed?

Other audio programs are suggesting to wait.
http://createdigitalmusic.com/2013/10/os-x-mavericks-compatibility-music-audio-software-updates-resources-advice/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+createdigitalmusic+%28createdigitalmusic.com%29

Also,
Current issues being reported to the Apple Consultants Network (ACN)for Apple Mavericks OS include, but are not limited to:
• Possible speed decrease with the operating system and applications
• Safari may use abuse the CPU
• Audio stutters
• Flash audio issues

[bplexico]

You can find JRMC19 before,Mac OS 10.8.4/10.6.8, and after, Mavericks, for MC build 19.0.60 on this thread.

The good news is the optimizations made in 19.0.60 improved performance benchmarks of MC relative to all previous MC releases for Mac OS.

The interesting news is it would appear that performance benchmarks were slightly better under pre-Maverick OS's.

http://yabb.jriver.com/interact/index.php?topic=83470.0

Barr

[mercman]

Late model Macs with 8-16 GB memory do better.

[jtwrace]

Late model Macs with 8-16 GB memory do better.

Well, as of this morning my 2009 Mac Mini was still playing on repeat with Integer enabled all night long.  Hopefully it will be working well tonight when I get home. 

[freddie40]

First is the JMark for 10.8.4 running JRiver 18.  Second is the JMark for 10.9 Running JRiver 19.  Conclusion, Mavericks with JRiver 19 is 12.25% faster

2009 Mac Mini - 8 GB Memory - 40 GB SSD Boot Drive - 2.53 GHz Intel Core 2 Duo - OS X - version 10.8.4 - Playback over Firewire 800:

JRMark (version 18.0.217): 1452

--------------------------------------------------------------------------------------------------------------

2009 Mac Mini - 8 GB Memory - 40 GB SSD Boot Drive - 2.53 GHz Intel Core 2 Duo - OS X - version 10.9 - Playback over Firewire 800:

JRMark (version 19.0.60): 1630

[jtwrace]

You should post those results in the thread for them.   

http://yabb.jriver.com/interact/index.php?topic=83470.0

[denweeks]

Mavericks is now working fine with JRiver MC 19. I did have a system crash that required running Disk Utility on startup and correcting all Permissions. Since then it has been working very well.