Hi budeades,
I know this has been more than 5 years, so I'm not really responding this for you, but rather to document for anyone else interested in the future:
I am still running Logic Express 8.0.2 on macOS Sierra 10.12.6 on a mid-2010 MacBook Pro. I know this makes me a ridiculous holdout, but hey, it's still serviceable, if you're willing to put up with some bugs and quirks. Here's what I've noticed:
- The biggest issue I run into is that any area in the Arrange window behind the transport after you play back becomes black pixels. It's as though the transport "paints" a black field in its wake. This was an issue in El Capitan as well. It may have cropped up in an earlier OS than that, I'm not sure. There is no negative audio effect to this, it just impedes workflow significantly and is annoying. When you scroll past the affected area and back, the image issue disappears. There are a few other similar visual glitches, in which portions of regions are displayed twice, etc. Similarly, scrolling past and back clears these issues.
- When bouncing, the checkmarks within the checkboxes are displayed upside down! They still work, they just look funny. This one strikes me as the strangest glitch.
- A pitch shift in Time & Pitch Machine can be prelistened correctly, but when you hit "Process and Paste," even though it shows a progress indicator saying "Samples Processed," it does nothing to the region selected in the Sample Editor. Tempo changes in Time & Pitch Machine, however, work correctly (unlike the users above report in Logic Pro 8 on Mountain Lion).
- Crossfades cannot be visually edited: using the crossfade cursor will change the visual length of the crossfade in the Arrange window, but will not change it aurally. You can, however, successfully make changes to the length and curves of crossfades by changing the numbers in the region inspector fields in the top left corner of the screen.
- I do run into system overloads, disk too slow messages, and errors re: audio engine processing speed. These, however, seem as common as similar mixing situations in the same version of Logic on an older machine I still use running OS X Snow Leopard, and almost never crash the program outright.
I doubt there are many people left running this combination of software and OS, but for anyone looking for what problems they might run into and what workarounds I have found, hopefully this has been helpful. I realize it sounds like a completely unworkable system, but I still use it successfully for professional recording and mixing work. I am, however, unusually tolerant of glitches and unusually stubborn about keeping old hardware running without paying for new software. As to the "if it ain't broke" line of thought, I've paradoxically had to upgrade this system's OS in order to use other audio software which won't run on older versions of OS X, and the tradeoff has been workable enough for me to live with it.
All my best to everyone — perhaps no one will ever read this, but maybe it will help some other holdout out there!