Lexia

 

Lexia Tech Note #100505

Lexia and Mac OS 10.5.x on Intel-based Apple Laptops

Lexia Programs

Lexia Early Reading
Lexia Primary Reading
Lexia Strategies for Older Students
Lexia Foundation Reading
Lexia Cross-Trainer

Version

Lexia Early Reading v3.0+
Lexia Primary Reading v1.0+
Lexia Strategies for Older Students v4.0+
Lexia Foundation Reading v1.0+
Lexia Cross-Trainer v1.03+

Platforms Affected

Mac OS 10.5

Description

Lexia products appear to run very slowly in Mac OS 10.5 (Leopard) when Intel-based Apple laptops are used.

Explanation

When a Lexia product is launched after the host computer has been awakened from sleep, it will communicate with the Lexiaserver database very slowly.  The student will experience normal speed while in an activity, but whenever a network read/write takes place, there can be delays in excess of 30 seconds. 

 

This issue seems to be related to how sleep is implemented on newer Apple portables.  The problem has been confirmed on Intel-based Laptops (i.e. MacBook and MacBook Pro. The MacBook Air will likely be affected).  During testing, this issue has not appeared on any i386 desktop computers nor on any PowerPC-based computer running 10.5, nor on any OS X machine (Intel or PowerPC) running 10.4.11 or earlier.

 

All reads and writes seem to be taking place normally (albeit slowly) and the data appears to be correct the database.  Progress gets saved and subsequent program launches reflect appropriate history.

 

Workarounds:

1) Don't close the lid on the laptop or otherwise sleep the computer if possible prior to launching Lexia.

2) If the computer has been put to sleep, it will need to be rebooted prior to launching Lexia so the product can run at normal speed.

 

Last Updated

5/05/2008