Logic Pro X and Mavericks
For anyone thinking about upgrading to Mavericks...... (OS X 10.9)
Firstly, don't upgrade straight away!!!!!
Only do so if you have full clone backups of your system HD. Use something like Carbon Copy Cloner or Superduper! to make a clone of your current system disk before you try and install Mavericks... and please do not rely on Time Machine backups.. as in the past, these types of backups have no provided full protection after upgrading the OS. Only a decent cloned image of your system drive, that you can easily and quickly restore from, will provide you with that safety net just in case anything goes wrong... so you can just restore from the cloned image and be back where you started from prior to the upgrade to 10.9
Wait a few days until some of the Users here and elsewhere.. have tested out the combination of LPX and the Public Release version of Mavericks.... I know it's very tempting to use the 'latest and greatest' stuff... but if you rely on your current setup in any real sense... hold off and see what the general option is in regards to compatibility with Drivers/Hardware and Software/plugins etc.... and you will save yourself a lot of potential headaches....
The most common issues after performing a major OS X upgrade are;
1) Driver/hardware incompatibility,...... Do not upgrade unless you know for sure your Audio/Midi interfaces have drivers with full Mavericks compatibility, ready for installation. Check with the device's Websites before even thinking about upgrading! No update or comfirmation of working fine? Don't upgrade!!
2) 3rd party apps and plugin incompatibility. Again, wait and confirm any plugins and other apps you use/need are fully 10.9 compatibile.... before upgrading.
3) Initial bugs.... All OS updates will have some bugs in them initially. .. Its the 'nature of the beast'. No matter how much Beta testing is done, bugs do and will slip through the cracks.... So, wait until at least the first couple of bug fixes are released to correct these enevitable issues... before making the transition.
The above is just some friendly advice from someone who has made all of these mistakes in the past (and paid for it!) It's your choice to follow it or ignore it of course...... but history tells us that those who just charge ahead and upgrade tend to suffer for it later.. Just looking at the hundreds of posts that were made here by users with issues.. after Mountain Lion was released.. willl confirm this....
Cheers..
Logic Pro X, OS X Mountain Lion (10.8.5), Motu UltraLite V3