The lists appear consistent across several different tests performed at separate times over a period of a day, and are independent of the number of xattrs attached to a file, the size of the file, or its type. The selectivity observed makes a bug appear unlikely. It is therefore either an undocumented feature, or a bug. Indeed, the only reference that I can find to the handling of xattrs by iCloud Drive (quoted above) assures developers that they are not tampered with in any way. I have been unable to find any reference to this process in Apple’s documentation. Items in iCloud Drive containing any of those xattrs retain those no matter which version of macOS they are viewed from, or the file copied from. ![]() Items in iCloud Drive containing any of those xattrs which were written there using the other version of macOS lose those xattrs when viewed or copied from iCloud Drive using the other version of macOS. This confirms that most xattrs are stripped by iCloud Drive in this fashion. I have examined files with a rich collection of extended attributes, under 10.12.6 and 10.13.2, on local storage and in iCloud Drive. Nor does it make any sense that only certain xattr types are supported: what works for one type should work for any other. This is a reasonable expectation, and I have been unable to find any list of xattrs which are not supported by iCloud Drive, nor when transferring files between Sierra and High Sierra. And all the file’s attributes are saved, if they add extended attributes to a file, those attributes are copied to iCloud and to the user’s other devices too. They too will have gone, because in the process of transferring the file via iCloud, the extended attributes used to store those annotations have mysteriously vanished.Īccording to Apple’s File System Programming Guide, which was last revised just over a year ago:Īpps create files and directories in iCloud container directories in exactly the same way as they create local files and directories. Open a PDF in Skim on one, add some annotations, save the modified document, and copy that across to your iCloud Drive.ĭownload it onto the other Mac, and Skim won’t be able to find any of those annotations. If you fancy a more sophisticated and functionally-significant test, download and install a copy of Skim from here onto both Macs. Try copying the file onto local storage, and you’ll see that your custom icon has gone for good. Not only is the custom icon nowhere to be seen, but the file size is smaller, the same as it was before you pasted in the custom icon. Then, inspect the same file on the same iCloud Drive on your other Mac, using the different version of macOS. Once there, it should continue to show the same custom icon to that Mac, using that same version of macOS. Keep a copy of that modified file somewhere safe, and copy it across to your iCloud Drive. To do that, find a file with a custom icon, such as an image thumbnail, and copy and paste between the top left icon images in the Finder’s Get Info dialog for them. On one Mac – it doesn’t matter which one – take a small text file and paste it a custom icon. TL DR: Don’t use iCloud Drive as a means of copying or sharing documents between Sierra and High Sierra, as they may well lose metadata in the process.Ī simple test requires two Macs, one running High Sierra 10.13.2, the other Sierra 10.12.6, connected to the same iCloud account, thus accessing a common iCloud Drive. If you try that, you’ll probably discover that most of the file’s extended attributes (xattrs) vanish in the copying. No they don’t, at least not if one Mac is running Sierra 10.12.6, and the other High Sierra 10.13.2. If the document does not appear, use the file type dropdown box and select PDF Files from the options.When you copy a file to iCloud Drive, then copy from there onto another Mac, the contents of the file move across unaltered, don’t they?.Open Word and use the Open command and browse to the folder where the document is stored.The following steps walk you through the process of doing this in Word: ![]() To demonstrate this, we will use the same article as we used in method two. However, if you have Microsoft Word or a similar word processor installed, then you can simply open the file and save it as a text or word document. There are also plenty of online PDF editors, many of which will let you convert PDFs to text. There are numerous ways to do this, including converting it into a Word document using Google Drive. But converting it to a more manageable format is easy. This makes it awkward if you want to work with this format in ChatGPT. ![]() Although PDFs contain text, they aren’t easy to edit. ![]() LLMs are huge text databases that AI chatbots reference to supply human-like responses. ChatGPT will happily read text, after all, the beating heart of any AI chatbot is a large language model (LLM).
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