It seems you're looking for information about installing Zotero 6.0.27 on iOS devices. Based on the text, I've summarized some key points for you:

1. The export-import function in Zotero 6.0.27 has changed compared to previous versions.

2. When exporting, the first item 'ZZZ' is placed directly in the library root, while the second item 'YYY' is placed as a child collection (subcollection) under 'ZZZ'.

3. To fix this issue, you can download and install Zotero 6.0.26 from the download page, install it over your current version in Applications, and reinstall the plugin from the Cite Word Processors pane of the Zotero settings.

Important note: This solution is only applicable for those using Intel chips. If you have an ARM64 device (like a Lenovo Chromebook), you may not be able to install Zotero 6.0.27 yet.

Additionally, I found that a new version of Zotero Portable 6.0.27 has been released. You can download it from the Zotero download page. Don't forget to also install the Zotero Connector for your browser to ensure seamless connectivity.

If you have any further questions or concerns about installing or using Zotero, feel free to ask!

Zotero 6.0.27 instal the new for ios