I'm looking at using ExtFS for Mac OS X 8.0 as a possible solution for accessing an ext3 filesystem on an external USB drive. I've downloaded the trial version of the software, installed it and rebooted my iMac (running OS X 10.6.5), but when I connect the drive it still isn't recognised. The external drive works fine when connected to a Linux machine and I can successfully do an fsck on the drive using the Macports version of e2fsprogs. The drive shows up in Disk Utility but the single partition on the drive is greyed out. The drive was partitioned using an MBR scheme which is detected by Disk Utility. I'm pretty sure the the ExtFS software is installed because if I select the partition within Disk Utility and click on the Erase tab, one of the options under the Format pulldown is Extended Filesystem. I'm wondering if I've hit a limitation on the size of partitions as this is a single partition on a 2TB drive. Confirmation that this isn't going to work with the current version of ExtFS would be useful, but I'm also happy to provide additional information, test out any suggestions and report back results if that would help anyone.