MacBook short battery life after High Sierra upgradeĮarlier versions of macOS that no longer receive regular security updates are vulnerable to malware.Mac slows down after High Sierra upgrade.

Some apps won’t work in macOS High Sierra.

Mac keeps logging you out of High Sierra.

Mac fails to start up after High Sierra update.

Let's discuss how you can remedy all of the common problems that can arise in macOS High Sierra. High Sierra may no longer receive updates, but that doesn't mean the well-aged OS doesn't have some lingering issues. Those iMacs without a back flap for a VGA external monitor will lose all access to the internal display if you attempt to install 10.2 or later without the firmware installed.Although Apple released macOS High Sierra in 2017, many of us still rely on earlier operating systems to accommodate older Macs and run outdated applications.

Note, you can't install Mac OS X from 8.6, as the firmware will not have been applied. Be very careful not to insert anything meant for tray only drives if you don't have a tray drive. The drive may be cleaned with a slot loading cleaning brush CD that slides in. None of these discs should say upgrade, update, dropin, or OEM.ġ0.3.5 to 10.3.9 combo and 10.4.6 to 10.4.11 PowerPC combo can upgrade the respective CDs mentioned above once installed.ĭisks may be unreadable also because the PRAM/CMOS battery is not current, or dirt or dust has gotten on the disc or drive or the disc is scratched. Tiger retail looks like and came in both multi-CD release and a single DVD release that only external Firewire drives could boot on the iMac G3, unless the iMac G3 has a built-in DVD reader. Once the correct firmware is applied, then you can install 10.3.5 retail or 10.4.6 retail: Also be sure that an authorized service tech has verified the PRAM/CMOS battery is current.Īnd should be installed first before the firmware is applied. If only the USB, ethernet, audio and modem ports are available it is compatible with 10.3.9 Panther.īefore you install anything, backup your data to two distinct locations.īefore installing any of the above, make sure you have the right firmware installed by installing the original Mac OS 9 retail installer disc. The two ports above the Y like logo on the left are 6 pin Firewire IEEE 1394a ports, and are the only external bootable Mac OS X ports on PowerPC Macs. If all of the above ports are present, you are compatible with 10.4.11 Tiger.

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