booyabug wrote:
Installed the old memory back in and everything seems to be working fine.
OK good, I was starting to worry that we had lost you. 😉
1. Backup using CarbonCopyCloner, SuperDuper or perhaps even Time Machine if you currentlly do not have a backup.
2. Download > Mac mini EFI Firmware Update 1.2
a. if your system is up to date or has a newer version, no harm it will not run.
b. if your system is not up to date, see step #3 below.
3. Be sure to carefully follow > About EFI firmware updates
Note: Some USB and FireWire devices may prevent firmware updates from installing correctly; disconnect non-essential devices and use only an Apple keyboard and mouse to apply the update.
Quit all open applications, then download and install the firmware update:
- Click the appropriate link in the table in EFI and SMC firmware updates for Intel-based Macs to download the right update for your computer.
- The downloader will place the disk image with an installer in your downloads folder or the location specified in the General tab under Safari > Preferences. If you downloaded the disk image via Safari, Safari will notify you that an application is in the image. Click OK to continue.
- If "Open safe files after downloading" is enabled in Safari preferences, the disk image file will mount by itself. If that preference is not enabled in Safari, double-click the disk image to mount it.
- In the mounted disk image, double-click the .pkg file to start the firmware update process. (The installer puts the EFI Updater in the /Application/Utilities folder by default, and opens it automatically.)
- Read the onscreen instructions and click Shut Down to proceed with the update. The firmware image will be loaded onto your computer. Your computer will shut down, but the update will not be installed until step 6.
- Turn on your computer but do not hold the power button down. The screen will turn black and remain in that state for up to 40 seconds. The computer will emit a long tone. A gray screen will appear and a status bar indicates the progress of the update.
Important: Do not unplug, shut down, or restart your computer while the update is taking place.
Installation may take several minutes.