iCloud Backup Tool — Technical Specs

System requirements, supported formats and trial limit for iCloud Backup Tool.

System Hardware & OS Support Matrix

Operating System Windows 11 / 10 / 8.1 / 7 (32-bit & 64-bit), Windows Server 2016-2022

Processor / CPU Intel Core i3 2.0 GHz or AMD equivalent

Memory (RAM) 4 GB minimum (8 GB recommended for 50GB+ mailboxes)

Disk Installation Space 250 MB free disk space for installation

Authentication Protocol Official Apple App-Specific Passwords compliant with Apple ID Two-Factor Authentication (2FA)

Connection Security Encrypted TLS connection to imap.mail.me.com:993

Supported Apple Domains Universal support for @icloud.com, @me.com, @mac.com, and custom Apple ID email configurations

Multi-Account Processing Centralized account queue supporting sequential batch processing of multiple family or executive accounts

Native macOS Mail Format Native Apple Mail .emlx packages with complete XML plist metadata and flags for 1-click Mail.app import

Outlook PST Archives Unicode 64-bit PST files with customizable 2GB–50GB partition splits to eliminate Outlook bloat

Document & Legal Archival Searchable ISO 19005-1 PDF/A with sequential Bates stamping, HTML5, MHTML, RTF, CSV, TXT

Cloud Ingestion Targets Direct OAuth 2.0 PKCE synchronization to Microsoft 365, Google Workspace, Gmail, and standard IMAP4rev1

macOS Optimization Native Universal Binary compiled for Apple Silicon ARM64 (M1/M2/M3/M4) and Intel; macOS Sequoia, Sonoma, Ventura

Windows Compatibility Native 64-bit application for Windows 11, 10, 8.1, 7

Checkpoint Resume Engine Local checkpoint database lets an interrupted session resume

Data Handling Processing runs on your computer. Data goes only to the mail provider or cloud destination you choose.

Enterprise Silent Mode Unattended silent installation flags and scriptable configuration presets for corporate Mac/PC fleets

ICLOUD

PST PDF MBOX EML EMLX MSG HTML MHTML RTF DOC TXT JSON CSV GMAIL OFFICE365 IMAP YAHOO

50 items per folder

The free trial exports up to 50 items per folder so you can verify conversion fidelity before purchasing.

Test performance on your hardware with a 50-item preview export limit.