Lightweight download manager
Includes at least 1 year of updates.
Your license is valid forever.
Also available on the Mac App Store.
Leech 3.2.1 requires
macOS 10.13 High Sierra
or newer.
For the nostalgically inclined,
older versions are here.
Disconnect from your current Wi-Fi network and try a mobile hotspot to see if the issue persists.
If you need help setting up an alternative or troubleshooting further, please share:
Click on and select Generate an app-specific password . cydia impactor error line 37
Cydia Impactor "Line 37" errors, often appearing as provision.cpp:37 , typically signal a breakdown in communication between the tool and Apple's authentication servers . This is particularly common in 2026 as the tool has largely been superseded by modern alternatives.
Launch the new Impactor.exe or app file and try sideloading again. Solution 2: Generate and Use an App-Specific Password Disconnect from your current Wi-Fi network and try
AltStore is currently the most widely used alternative to Cydia Impactor. It uses your computer as a local server to resign apps using your Apple ID.
Sometimes a "pending" or "conflicting" certificate on Apple's end causes the 200 OK response to fail. Open Cydia Impactor. In the top menu, click on Revoke Certificates This is particularly common in 2026 as the
How to Fix Cydia Impactor Error Line 37: A Complete Troubleshooting Guide
For Windows users, open > Firewall & network protection and temporarily toggle it off.
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The file: http; line: 37; what: _assert(code==200) error is a frustrating reminder that Cydia Impactor, once a revolutionary tool, has aged beyond its intended lifespan. Jay Freeman (Saurik) has not released a significant update since 2019, and Apple’s continuous security improvements have left Cydia Impactor unable to reliably communicate with Apple’s provisioning servers.