- Testing conducted by Apple in October 2020 on production 1.4GHz quad-core Intel Core i5-based 13-inch MacBook Pro systems with 8GB RAM, 256GB SSD, and prerelease macOS Big Sur. Systems tested with WPA2 Wi-Fi network connection while running on battery power, with display brightness set to 12 clicks from bottom or 75%.
- Update from Catalina or Mojave. Apple suggests that you should have 20GB of free space on your Mac's drive before you install a new version of macOS - although you may not need that much.
About Apple security updates
For our customers' protection, Apple doesn't disclose, discuss, or confirm security issues until an investigation has occurred and patches or releases are available. Recent releases are listed on the Apple security updates page.
Testing conducted by Apple in October 2020 on production 1.4GHz quad-core Intel Core i5–based 13-inch MacBook Pro systems with 8GB of RAM, a 256GB SSD and prerelease macOS Big Sur. Systems tested with a WPA2 Wi-Fi network connection while running on battery power, with display brightness set to 12 clicks from the bottom or 75 per cent.
Apple security documents reference vulnerabilities by CVE-ID when possible.
For more information about security, see the Apple Product Security page.
Released March 8, 2021 Paragon ntfs for mac seagate not working.
Available for: macOS Catalina and macOS Mojave
Impact: Processing maliciously crafted web content may lead to arbitrary code execution
Description: A memory corruption issue was addressed with improved validation.
Catalina Apple Update Icloud
CVE-2021-1844: Clément Lecigne of Google’s Threat Analysis Group, Alison Huffman of Microsoft Browser Vulnerability Research
Catalina Apple Update Problems
Apple Catalina Update Microsoft Office
* After installing this update, the build number for Safari 14.0.3 is 14610.4.3.1.7 on macOS Mojave and 15610.4.3.1.7 on macOS Catalina.