32bit apps can use 4GB ram, 64bit apps up to 16 exabyte (16 billion gigabytes…).gomi wrote:snow leopard works great.
force it to boot with 64 bit extensions and let ableton have a whole 4GB to itself (if you have more then
4GB of ram that is.. I've got and it's smooth..
sudo nvram boot-args="arch=x86_64"
will alter your com.apple.boot.plist to load
in 64bit mode by defaut (only xserves do it by default)..
that is assuming you can do 64bits on your mac..
This will allow you to use lots of ram... 64 bit apps will open even if you don't do this.
So Live, being a 32 bit app, can use up to 4GB ram on Tiger, Leopard & Snow Leopard anyway. Even if it would be a 64bit app, switching to the 64bit kernel would make no difference in its ability to use more than 4GB.
The reason why Snow Leopard boots per default in a 32bit kernel right now is due to a lack of 3rd party 64bit kernel extensions, as every kernel extension (like audio/midi drivers) would need to be 64bit, for OS X to be able to boot into 64bit.
I boot permanently the 64bit kernel, as my only 3rd party drivers (motu) are now 64bit.
Good app: http://www.macupdate.com/info.php/id/32 ... e-selector - http://www.ahatfullofsky.comuv.com/Engl ... S/SMS.html
If you wanna try booting the 64bit kernel, be sure every 3rd party extension/driver is 64bit!- it shows whether you have a 32-bit or a 64-bit processor
- it shows whether you have a 32-bit or a 64-bit EFI
- it shows whether the MacOS X Kernel is set to boot in 32-bit or in 64-bit mode
- it shows whether the MacOS X Kernel is running in 32-bit or in 64-bit mode
- it shows whether Apple officially supports booting a 64-bit kernel on your Mac
- it allows you to select whether you want to start the MacOS X Kernel in 32-bit or in 64-bit mode (the setting might be ignored on MacBooks, depending on how Apple implements the restriction)
- accompanying webpage explains what the whole commotion about 32-bit and 64-bit in MacOS X Snow Leopard is about
For Live there is no performance gain with booting the 64bit kernel (though for some 64bit apps there can be: http://www.macperformanceguide.com/Snow ... mance.html)
http://support.apple.com/kb/HT3696 - http://www.apple.com/macosx/technology - http://snowleopard.wikidot.com/
Snow Leopard & Live 7.0.18 running fine here.