Hi everybody,
Has anyone encountered such a problem/s ?
Please HELP me, if you can,
Issue 1 is:
Starting both Macs simultaneously,
1. When MP5.1 boots on High Sierra, iMac automatically enters Target Display Mode (TDM) and works as a Monitor.
2. When MP5.1 boots on Catalina, at the beginning of OS boot up, iMac display shows "Boot Screen" of MP5.1, and when OS booted, the view comes back to MP5.1 main Monitor and iMac's display turns black as he is entering TDM, but no further actions, just stays Black/Blank :-(
Connection between machines is with DisplayPort to Mini Display Port cable.
Issue 2 is:
On MP5.1 there is two Drives :
1. WD_BLACK SN850 NVMe™ SSD-1TB (Catalina)
2. OWC Mercury Electra 6G 240Gb PCIe 2.5" SSD (High Sierra)
When starting MP5.1 on Catalina after a while (3-10min, some times longer) from the beginning, OWC Mercury Electra 6G 240Gb PCIe 2.5" SSD, with two partitions on it "HighSiera" & "Data", disconnects/disappears and 2 messages appears saying :
"Disk Not Ejected Properly. Eject "HighSiera" before disconnecting or turning it off."
"Disk Not Ejected Properly. Eject "Data" before disconnecting or turning it off."
Closing those two notice windows and after Restarting MP5.1, Drive/s does not appears, so to get access to Drive/s, I need to Shut Down & Start again MP5.1.
Main machine: MP5.1(Mid2010), 2x3.33GHz,
NVIDIA Quadro K600,
Runs Catalina or High Sierra,
Catalina Boots from WD_BLACK SN850 NVMe™ SSD-1TB,
High Sierra Boots from OWC Mercury Electra 6G 240Gb PCIe 2.5" SSD (two partitions "HighSiera" & "Data"),
Firmware update 144.0.0.0.0,
genuine usb keyboard.
iMac machine: iMac 27-inch(Mid2010), 3.2 GHz Intel Core i3,
ATI Radeon HD 5670 512 MB,
Runs High Sierra,
Crucial MX500 1TB 3D NAND SATA 2.5",
Firmware update 99.0.0.0.0,
genuine usb keyboard.
So that's my two issues.
Please HELP me
Thank you in advance
Has anyone encountered such a problem/s ?
Please HELP me, if you can,
Issue 1 is:
Starting both Macs simultaneously,
1. When MP5.1 boots on High Sierra, iMac automatically enters Target Display Mode (TDM) and works as a Monitor.
2. When MP5.1 boots on Catalina, at the beginning of OS boot up, iMac display shows "Boot Screen" of MP5.1, and when OS booted, the view comes back to MP5.1 main Monitor and iMac's display turns black as he is entering TDM, but no further actions, just stays Black/Blank :-(
Connection between machines is with DisplayPort to Mini Display Port cable.
Issue 2 is:
On MP5.1 there is two Drives :
1. WD_BLACK SN850 NVMe™ SSD-1TB (Catalina)
2. OWC Mercury Electra 6G 240Gb PCIe 2.5" SSD (High Sierra)
When starting MP5.1 on Catalina after a while (3-10min, some times longer) from the beginning, OWC Mercury Electra 6G 240Gb PCIe 2.5" SSD, with two partitions on it "HighSiera" & "Data", disconnects/disappears and 2 messages appears saying :
"Disk Not Ejected Properly. Eject "HighSiera" before disconnecting or turning it off."
"Disk Not Ejected Properly. Eject "Data" before disconnecting or turning it off."
Closing those two notice windows and after Restarting MP5.1, Drive/s does not appears, so to get access to Drive/s, I need to Shut Down & Start again MP5.1.
Main machine: MP5.1(Mid2010), 2x3.33GHz,
NVIDIA Quadro K600,
Runs Catalina or High Sierra,
Catalina Boots from WD_BLACK SN850 NVMe™ SSD-1TB,
High Sierra Boots from OWC Mercury Electra 6G 240Gb PCIe 2.5" SSD (two partitions "HighSiera" & "Data"),
Firmware update 144.0.0.0.0,
genuine usb keyboard.
iMac machine: iMac 27-inch(Mid2010), 3.2 GHz Intel Core i3,
ATI Radeon HD 5670 512 MB,
Runs High Sierra,
Crucial MX500 1TB 3D NAND SATA 2.5",
Firmware update 99.0.0.0.0,
genuine usb keyboard.
So that's my two issues.
Please HELP me
Thank you in advance
Last edited:
