from the mac user guide . . .When I click ok the dialogue box just closes and that's that.
from the mac user guide . . .
- In the Finder on your Mac, locate the app you want to open.
Don’t use Launchpad to do this. Launchpad doesn’t allow you to access the shortcut menu.- Control-click the app icon, then choose Open from the shortcut menu.
- Click Open.
The app is saved as an exception to your security settings, and you can open it in the future by double-clicking it just as you can any registered app.
Luckily I've just discovered that I've got a copy of my library on my Mac called 'iTunes not matched' which I made in anticipation of this which has all the files there, pre corrupt that I can re-load back. Just tested 'take on me' which is there in mp3 format and it works fine. Will be a bit of a laborious task, but I have a way out.
This has thrown up another question, why are these now corrupted files not showing up as 'matched AAC' like the ones that have been matched? Does iTunes Match replace files with straightforward AAC files and call them that and not 'matched' ones? The fact that 'take on me' is on my previous library in mp3 format suggests that it does do that.
Wow glad you found the working files - since MAX won't open them - my guess is they are corrupted
I don't know about Matching files - I use spotify for streaming and finding new music and keep my local music on iTunes - that keeps them separate - and less confusing for back ups
The way I look at things is "What would happen if my Apple ID suddenly does not work" - Photos, music, movies - gone!
This is all I get. I've installed the ffmpeg too View attachment 1728544
you can locate ffmpeg within Audacity manually. One other thing: because the album preview of your currently not playable files is okay as well the file size feasible, it seems probable that the m4a-container is damaged. If you can’t get audacity&ffmpeg to work it might be worth to give it a shot with a hexditor. This is tedious but maybe worth a shot.
At this point I'm actually considering rolling my library back to September, before iTunes Match got it's paws on it.
The key to all of this, as you have discovered, is keeping really good backups, plus off-site backups. And you need them to go way back in case you discover a problem that's been lingering, undetected, for years. Like many, losing my iTunes library would be downright catastrophic - it's full of custom stuff that I simply can't replicated in any way (home-made recordings from a crank-phonograph, for example), so I really understand your anxiety and it's good to hear you found backups that work for you!
That said, an I expect others would agree; I will absolutely NEVER EVER in any way, EVER let anything automatically touch my iTunes library. Way, way, way too many horror stories. If I ever subscribe to a service rather than purchasing music it won't be Apple's service, because I don't want Apple's hands on my music library, period. I absolutely don't trust them.
If I were you, I would find an alternative way to get higher-quality copies of the songs/albums you wish. It's not really that expensive or hard to do so; especially if you are willing to purchase used CDs. So many previously-hard-to-find recordings are now easily available (Ask me how long it took me 'back in the day' to find my own copies of the out-of-production Buckingham Nicks and Pinkworld albums. Go ahead. I dare you to ask! ? I had to do it backwards, in the snow, uphill, both ways too!). I curate my library mostly from CD in Apple Lossless (even though I know full-well that's a placebo and that high-bit-rate MP3s and AACs are just fine), and then use Serve To Me / Stream To Me to play my music wherever I want. No need for anyone but me to touch any of it. No need for subscriptions. Safe.