After moving mounted volumes from Qnap NAS to iMac as host with CentOS as client, the directory and file ownership cannot be changed to Apache at the client side. No matter using root or user privilege to command the chown.

Solution:

Add the following in iMac’s /etc/exports:

[nfsshare] -rw -maproot=root:wheel

Tricks:

-maproot directive can pass the root control from nfs host to client, without it even changing the directory access and file permission to 777 in host, or changing the mount options at client cannot solve the issue.

Config:

• OSX:        10.12.3
• CentOS:   7.3

The post Cannot Change Ownership on NFS Files appeared first on LarryLai.

Just bought a Wacom Intuos Draw CTL-690, and want to install a note taking app with drawing feature in iMac running OSX Mavericks, found a good one – MS OneNote, but it only support OSX 10.10 or above. Being aware of the possibility that the latest OSX Sierra does not fully support old Adobe CS5.5 Master Collection, I tried to upgrade to OSX Yosemite. After downloaded Yosemite install package on the web as it is unavailable on Apple’s support site any more.

There was error after verifying the system when running the Yosemite installer suggesting contact AppleCare.

Solution:

Directly upgrade to OSX 10.12 Sierra. There is some little problem with Photoshop. Need to install JavaSE again as instructed by Photoshop after upgrade.

Tricks:

• It is good practice to backup the old OS with Time Machine for Mac even though in my case, there is no need to restore to original OS version.
• If upgrading to Sierra has potential application incompatibility issue with new OS, I think there still may be some with Yosemite or El Capitan, why not give Sierra a try as it is 10.12.1 not the xx.xx.0 version.

Config:

• OSX 10.9.5 -> OSX 10.12.1
• Photoshop  12.1

The post Mac OS X Maverick Upgrade appeared first on LarryLai.

Uploaded keynote file to iCloud through safari, after a day the iPad still could not see it when clicking the “+” sign at top left corner of Keynote in iPad.

Solution:

Go to Settings in iOS device, click iCloud and turn it off for a while then turn it on again

Tricks:

People would ask why not using Google Drive to transfer the files. It is interesting that when you upload a keynote file to Google Drive, the file will become a set of files including data and various image files under a folder with the name of the keynote file, then it is useless to download it to the iOS, i.e. you cannot play anything about the original keynote file in your iOS devices.

Config:

iOS    9.1

The post Demystify iCloud Sync appeared first on LarryLai.

Solution:

Open “Disk Utility” to Repair Disk Permissions.

Configuration:

OSX version 10.8.5 update to 10.9

The post OSX 10.9 Upgrade Issue appeared first on LarryLai.

Yum cannot proceed even though the Transaction Testing is passed. but after seeing a message: Warning: RPMDB altered outside of yum

then waited for a while, it showed: killed. Then stop the installation

Using the following are all not effective:

• rm -f /var/lib/rpm/__db.*
• yum clean all
• rpm –rebuilddb

Solution:

1. Run: Yum history new
2. Reboot

Configuration:

OS: CentOS 6.4

The post Yum – Warning: RPMDB altered outside of yum … killed appeared first on LarryLai.