Depending on the version of Mac OS X installed, it may be necessary to install or update the Adaptec drivers for a specific SCSI card in the system.
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Mac OS X 10.1 to OS X 10.4.x will come with varying versions of the following drivers.- Adaptec78xxSCSI.kext
- Adaptec2906-2930.kext
- Adaptec29160x.kext
- Adaptec39160.kext
The Adaptec78xxSCSI.kext drivers are not supported by Adaptec Technical Support.
Note:
It is not necessary, but the 78xxSCSI.kext drivers can be removed from the 'SystemLibraryExtension' folder prior to installing the non-Beta 1.2 or 1.1 versions of the drivers. Removing these drivers will not inhibit the functionality or performance of the Adaptec controller in any way. For reference, here is a list of drivers that are installed in Mac OS X.
- Adaptec290x-2930
- Adaptec29160x.kext
- Adaptec39160.kext
These drivers can be located on the following sites:
Adaptec290x-2930.kext
Version 1.1
Mac OS X Driver, version 1.1
Adaptec29160x.kext
Version 1.2
Mac OS X Driver, version 1.2
Adaptec39160.kext
Version 1.2
Mac OS X Driver, version 1.2
Dell 3100cn Windows 10 Driver
In order to remove the drivers from the 'SystemLibraryExtensions' folder on systems with OS X below Mac 10.3.x, the 'Root User' must be enabled or it is possible to run the 'Uninstaller' Command from the download for each of the drivers. An alternative to this would be to restart the system in Mac OS 9.x.x, locate the 'SystemLibraryExtensions' folder for OS X, and manually remove the drivers.In addition to removing the driver file (for example the Adaptec78xxSCSI.kext
), two additional files in the 'SystemLibrary' folder will need to be removed. These files are Extensions.kextcache and 
Extensions.mkext.Restarting the system will re-generate these files without references to the deleted files.
If the system has been restarted in OS 9.x.x and the earlier versions of the Adaptec drivers have been removed, then the system will need to be restarted back in OS X in order to run the 'PKG' file for each of the downloaded files.
After the drivers have been installed, the system may need to be restarted in order to allow the appropriate driver to load. After the restart has completed the devices should begin to mount automatically.
Some devices such as CDRW drives and scanners will require updated third-party software in order for them to write to CD’s or scan, but should work properly with updated software.