imessage-exporter

tos app, select all photos, and export them. This will make any JPEG photos much larger than they originally were due to ridiculous default quality settings. 2) If you have access to a Windows machine, install iCloud for Windows, let the photos sync, and copy them to a new directory. 3) Use iCloud's web UI to download all the photos on the new machine. Mail: pick a new provider. Several ways. 1) Add the new provider account to macOS mail. Copy and paste your emails/folders between accounts. 2) Create an app-specific password for iCloud, use the provider's migration facility (most major players support this and it will move your contacts and calendars). Calendars: if you are sharing calendars with iOS users or will keep some Apple devices, keep iCloud as your primary calendar system. Use DavX5 (https://www.davx5.com/) on Android to setup a two-way mirror between your Android calendar app. Your email provider may provide calendar mirroring (Fastmail does, for one). If you aren't sharing / using your mail provider, export your calendars to ICS files from Apple Calendar and import into your new calendar app. Contacts: if you will continue using Apple products, keep iCloud as your primary contacts system and use DavX5. Otherwise, open macOS Contacts, select all, and export to a VCF file. Import this into your new Contacts app. Documents: copy to a backup drive from the machine, download them from iCloud on the web, use iCloud for Windows for the initial sync. Whatever suits you. If you are using Apple's office apps, be sure to load and save as a more universal format.