![]() OCCT Perestroïka, free and safe download. If the installer doesn't see your disk, or it says that it can't install on your computer or volume, you might need to erase your disk first.Download and install current or previous versions of the Mac operating system on compatible Mac computers. OCCT Perestroïka latest version: Test the stability of your computers. OCCT Perestroika is a program designed to perform PC stability tests. If the installer offers you the choice between installing on Macintosh HD or Macintosh HD - Data, choose Macintosh HD. ![]() It allows you to test the CPU and GPU under stressful conditions, as well as to check the Power Supply to check the operation of the PC power supply subsystem. Allow installation to complete without putting your Mac to sleep or closing its lid.The test results are displayed in the form of informative graphs on all monitored items. Intel-powered Mac: Press and hold Option (Alt) as you turn your Mac on. Your Mac might restart and show a progress bar several times, and the screen might be empty for minutes at a time.Īfter installation is complete, your Mac might restart to a setup assistant. If you're selling, trading in, or giving away your Mac, press Command-Q to quit the setup assistant without completing setup, then click Shut Down. When the new owner starts up the Mac, they can use their own information to complete setup.
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